3-Piece Empty Aerosol Can



3-piece tinplate aerosol can is a sealed container composed of three independent metal components: the can body, the top and the bottom, which are combined through processes such as welding and crimping.


Parallel development of traditional and emerging fields

The food, pharmaceutical, and daily chemical industries remain core application scenarios, while new categories such as e-cigarettes have become growth highlights. Environmental policies are promoting the substitution of metal aerosol cans for plastic and glass packaging, especially in personal care and cosmetics.


Technological upgrading and green transformation

Optimization of production processes: Enterprises are accelerating the introduction of automated production lines and green technologies (such as energy-saving welding processes) to enhance product quality and production efficiency and reduce carbon emissions.


Material sustainability

The recyclability of tinplate aligns with the trend of a circular economy, and environmental policies are driving industry standardization and the improvement of recycling systems.

Why do your glass bottles always have problems?

From surface smoothness to pump head compatibility, we control quality across two dimensions.

I. Appearance Quality

Surface Smoothness: glass bottle bodies must be free of scratches, bubbles, pinholes, uneven shrinkage, and other defects. Even minute surface bubbles may harbor dirt or foster bacterial growth (posing significant risks for skincare and food products). We ensure uniform surface smoothness through a combination of visual inspection under natural light and tactile verification.

Color Consistency: Colors must closely match the color swatch or Pantone number confirmed by the customer, with no visually discernible color variation permitted within the same batch. This requires suppliers to possess advanced color matching systems and stable masterbatch addition processes.

Printing Durability: For screen printing, foil stamping, labeling, etc. Inspection should focus on print clarity, with particular emphasis on testing print adhesion and wear resistance. Common tests include the “tape peel test” (applying 3M tape and peeling it off to check for ink transfer) and the “abrasion test” (rubbing the printed surface over 50 times with a soft cloth to ensure no fading).

II. Size Compatibility

Bottle Dimensions: Measure critical dimensions such as the outer diameter of the bottle opening, height, and wall thickness using tools like calipers and projectors to ensure they fall within the tolerances specified in the drawings.

Fit between cap and bottle: The diameter, thread pitch, and height of the bottle neck must perfectly match the cap. Manual assembly testing verifies that the cap twists on smoothly without binding, neither too loose nor too tight. For flip-top caps, hinge operation must be tested over 100 times to ensure no risk of breakage.

Pump Head/Spray Nozzle Fit with Bottle Opening: For injection-molded bottles equipped with pump heads (e.g., lotion glass bottles) or spray nozzles (e.g., spray glass bottles), the inner diameter of the bottle opening and the flatness of the opening surface are critical. Dimensional deviations may cause pump head clogging or uneven dispensing. After assembling the pump head/spray nozzle onto the bottle, we conduct over 20 dispensing tests to ensure smooth operation.

skincare lotion glass bottles

Top 5 Custom Foam Inserts for EVA Cases Benefits and Applications

When it comes to product protection and presentation, custom EVA cases have become a ideal solution for industries worldwide.  But what truly enhances their functionality is what's inside, the correct foam insert.  At Yisi Packing, we understand that a well designed foam insert can make all the difference in protecting, organizing, and showcasing your products.

 

In this article, we’ll explore the top 5 custom foam insert types used in EVA cases, their unique benefits, and where they are commonly applied.

 

1. PU Foam (Polyurethane Foam)

 

Best for: Lightweight, shock absorbing protection

Industries: Consumer electronics, medical tools, retail packaging

PU foam is soft, flexible, and highly shock absorbent, making it ideal for items that require gentle cushioning.  Its spongy texture allows for a snug fit around irregularly shaped products. It’s also affordable and lightweight, perfect for consumer products like cameras, beauty tools, and medical devices.

Benefits:

  • Lightweight and flexible

  • Absorbs shock and vibration

  • Cost effective for high volume packaging

 

2. PE Foam (Polyethylene Foam)

 

Best for: Durable, rigid support and reusable packaging
Industries: Tools, drones, instrumentation, industrial kits

PE foam is firmer than PU foam, offering better structure and durability.  It’s ideal for heavier items or equipment that need to be stored or transported repeatedly.  PE foam inserts also resist moisture and chemicals, which is a major plus for industrial and outdoor applications.

Benefits:

  • High durability and impact resistance

  • Good for repeated use

  • Water and chemical resistant

 

3. EVA Foam

 

Best for: Premium protection and branding
Industries: Luxury products, electronics, promotional kits

EVA foam is the same material as the outer shell of your case, offering a cohesive, high quality look and feel.  It’s semi rigid, meaning it holds its shape well while still providing excellent shock absorption.  EVA foam is also great for custom color matching and CNC, excellent for premium product packaging or promotional kits.

Benefits:

  • Premium look and feel

  • Excellent customization (color, logo, shape)

  • Long lasting structural integrity

 

4. Die Cut Foam Inserts

 

Best for: Custom fit protection for unique or complex products
Industries: Medical devices, instrumentation, collectibles

Die cut foam can be created from PU, PE, or EVA and is precision cut to fit your product’s exact shape.  This ensures maximum protection and eliminates shifting during transit. It's perfect for high value or sensitive products that demand a tailored fit.

Benefits:

  • Perfectly fits any shape

  • Offers maximum protection

  • Enhances presentation and unboxing experience

 

5. Pick and Pluck Foam (DIY Foam)

 

Best for: Low volume or adjustable storage
Industries: Hobbyists, toolkits, DIY, samples

Pick and pluck foam allows users to remove foam blocks manually to fit their items.  While not suitable for high end or mass market products, it’s great for prototypes, sample kits, or adjustable storage cases where product sizes may vary.

Benefits:

  • Flexible layout without tooling

  • Cost effective for small runs

  • Easy to customize on the spot

 

Choosing the Right Foam Insert

 

Each type of foam insert offers specific advantages depending on your product's size, weight, fragility, and usage.  At Yisi Packing, we work with clients to develop custom EVA case solutions with the perfect foam insert to ensure functionality, durability, and an enhanced user experience.

 

Need help designing your next custom EVA case with foam inserts?


👉 Contact us today for a free consultation or sample!

 

What We Really Do to Test EVA Case Durability and Quality

At Yisi Packing, we don’t just design custom EVA cases that look good, we build them to last.  For many of our clients, durability isn’t a luxury; it’s a requirement.  Whether you're transporting precision medical devices, expensive electronics, or delicate beauty tools, protection is everything.

 

That’s why our commitment to quality goes beyond materials and design.  It includes different testing to ensure every custom EVA case meets the highest standards in performance, durability, and reliability.

 

Here’s a behind the scenes look at how we test our EVA cases before they reach your hands.

 

🧪 1. Drop Test: Simulating Real World Accidents

 

In reality, cases get dropped.  Whether it’s in shipping, in a warehouse, or by an end user, impacts happen.  We simulate this by dropping cases from various heights and angles onto hard surfaces to test shock absorption.

 

Our custom EVA shells, combined with carefully designed foam interiors, are engineered to distribute and minimize impact, protecting the contents inside.  We analyze:

 

  • Case integrity after impact

  • Zipper and hinge performance

  • Internal foam displacement

 

💪 2. Compression Test: Handling the Pressure

 

If your case is going to be stacked, squeezed, or stored under pressure, it needs to hold its shape.  Our compression tests apply controlled weight and pressure to the case to see how it reacts.  We monitor:

 

  • Deformation of the EVA shell

  • Foam memory retention

  • Structural performance over repeated tests

 

This is especially important for industries like medical devices, tools, and electronics, where even slight pressure damage could affect function.

 

🌊 3. Water Resistance Testing: Protecting Against Moisture

 

While EVA cases aren’t fully waterproof, many of our clients require a level of water resistance.  It is especially in outdoor or high humidity environments.  We conduct splash and soak tests to evaluate:

 

  • Zipper sealing and water entry

  • Moisture protection of inner contents

  • Dry time and Structural integrity

 

Want better moisture protection?  We offer water resistant zippers, custom seals, and coated materials upon request.

 

🔄 4. Temperature & Aging Tests: Built for the Long Haul

 

Temperature extremes can warp or weaken lower quality materials.  Not ours.

 

We expose cases to hot and cold temperature cycles to simulate real world transport and storage conditions, it is from frozen warehouses to hot delivery trucks.  We also conduct aging simulations to assess:

 

  • UV resistance

  • Material discoloration

  • Long term flexibility of zippers and joints

 

✅ Why This Matters for You

 

Your product deserves packaging that performs under pressure.  Our durability testing isn’t just about checking boxes, but it’s about protecting your investment, minimizing returns, and ensuring your customers have the best possible experience.

 

At Yisi Packing, every custom EVA case is built on design, functionality, and proven performance.

 

Looking for a custom case that’s tested to protect?


Let’s talk.  Our engineering and sales teams are ready to help design a solution that fits your product, and stands up to the real world.

 

📩 [Contact Us] | 🌐 www.packingyisi.com

 

Why a Product Warranty Matters When Choosing a Custom EVA Case Manufacturer

In today's competitive market, choosing the right custom EVA case manufacturers is about more than just price or design.  But it's about reliability, durability, and trust.  At Yisi Packing, we understand that our customers need more than just a protective case.  They need confidence in the product they’re investing in.  That’s why we proudly offer a product warranty on all our custom EVA cases.

 

What is a Product Warranty?

 

A product warranty is a promise from the manufacturer to the customer that the product will meet certain standards of quality and performance.  If the product fails due to manufacturing defects within the warranty period, the manufacturer agrees to repair or replace it.

 

At Yisi Packing, our warranty covers manufacturing defects, including faulty zippers, seams, or materials, ensuring that our customers receive high quality EVA cases that perform as expected.

 

Why Is a Warranty Important?

 

  • Builds Trust with Customers
    A product warranty signals that the manufacturer stands behind their product.  It reassures customers that they are buying from a reliable source who values quality and long term performance.

 

  • Protects Your Investment
    Whether you're purchasing cases for consumer electronics, medical devices, or industrial tools, a warranty gives you peace of mind that your purchase is protected.

 

  • Reflects Manufacturer Confidence
    Offering a warranty shows that the manufacturer is confident in their quality control and materials.  At Yisi Packing, our EVA cases go through strict quality inspections to ensure they meet both international standards and your custom requirements.

 

  • Enhances Your Brand Image
    If you're an OEM or brand looking to include custom EVA cases with your products, offering your customers a product backed by a manufacturer’s warranty improves your own brand reputation.

 

What Does Yisi Packing’s Warranty Cover?

 

Our standard product warranty covers:

 

  • Material defects (e.g., EVA shell, lining, foam inserts)

  • Zipper and stitching failures

  • Manufacturing workmanship

 

The EVA foam case warranty period is typically 9 months from the date of delivery, but we also offer flexible warranty terms for large or long term clients.  Damage caused by misuse or unauthorized modification is not covered, but we’re always happy to help troubleshoot any product issues.

 

Why Choose Yisi Packing?

 

Yisi Packing has been manufacturing high quality custom EVA cases in China for over a decade.  We offer full OEM/ODM services, competitive pricing, low MOQs, and fast production times.  Most importantly, we back every product with our commitment to quality, demonstrated by our product warranty and long term customer partnerships.

 

When selecting a custom EVA case supplier, make sure you're not only getting the best design and price, but also the product cases warranty.  At Yisi Packing, we’re committed to delivering EVA cases that meet your expectations, and backing them with a warranty that proves it.

 

Contact us today to learn more about our custom EVA case solutions and warranty policies.

Classification of dropper bottles

1. Classification by Bottle Material: Glass, Plastic, Metal

Glass dropper bottles: Their primary advantage is their chemical inertness, meaning they won't react with the contents. They're ideal for storing active ingredients (such as vitamin C serums and retinol serums) or corrosive liquids (essential oils and pharmaceutical solvents).

Clear glass dropper bottles: Suitable for products that don't require light protection (such as regular toners and serums), making it easier to see how much is left.

Dark glass dropper bottles (amber, cobalt blue): With built-in UV protection, they effectively block UV rays, preventing oxidation and deterioration of ingredients, making them the best choice for light-sensitive products.

Plastic dropper bottles: Their primary advantages are lightness, drop resistance, and low cost, making them suitable for daily use and various office settings. However, care should be taken with the material to avoid chemical intrusion.

PP dropper bottles: They offer excellent heat resistance (can withstand temperatures ranging from -20°C to 120°C) and are chemically stable. They are commonly used to store basic skincare products (lotions, serums) or children's skincare products.

PET dropper bottles: They offer high transparency and a glass-like texture, but have poor corrosion resistance and are suitable for liquids without strong active ingredients.

HDPE dropper bottles: They are hard and resistant to pressure, making them suitable for topical medications or low-concentration industrial reagents.

Metal dropper bottle: mainly made of aluminum and stainless steel, with good texture and sealing. Because metal may react with acidic/alkaline liquids, its application range is relatively small.

2. Classification by dropper tip type:

Standard rubber-tipped droppers: The most common combination is a nitrile rubber or silicone tip with a glass or PP tube.

Integrated plastic droppers: The dropper and tip are injection-molded into one piece using materials such as TPE, offering cost control and design flexibility.

Screw-on dropper tips: The dropper tip itself is threaded and screws directly onto the bottle (no outer cap required). An internal sealing ring is required.

Anti-backflow droppers: A special internal valve prevents liquid from flowing back into the bottle when the tip is released, causing contamination or air bubbles. These require high technical requirements and come at a high cost.

Quantitative droppers: Special features (such as scales and flow-restriction mechanisms) allow for more precise, fixed dispensing of liquid.

3. Classification by Capacity:

Common capacities include 5ml, 10ml, 15ml, 20ml, 30ml, and 50ml. The smaller the capacity, the higher the precision required for the dropper.

Skincare dropper bottles: Dropper capacities typically range from 0.5ml to 2ml, allowing for a single application (e.g., 1ml of serum) to minimize contamination from repeated contact. These bottles often feature a threaded cap with a silicone seal for enhanced sealing. Some high-end models utilize a vacuum dropper design (without a straw) to completely isolate the bottle from air and extend the shelf life of the serum. Capacities under 30ml are suitable for small serums, while 50ml is suitable for lotions.

Pharmaceutical dropper bottles: Medicinal dropper bottles must meet pharmaceutical standards (such as USP and GMP certification). Sterility and accurate dosing are paramount.

Mostly made of borosilicate glass or food-grade PP, they can be sterilized at high temperatures (e.g., 121°C).

Droppers feature graduated scales (e.g., 0.1ml, 0.5ml) to ensure accurate dosing (e.g., for children's fever-reducing medications and eye drops).

Some come with dust caps to prevent contamination of the dropper tip. Suitable for use with oral drops, topical disinfectants, and ophthalmology/ENT reagents.

Essential Oil/Aromatherapy Dropper Bottles: These dropper bottles offer two key advantages, addressing the volatility and photophobia of essential oils:

They are almost always made of dark glass (primarily amber), which blocks UV rays;

The dropper has a thin diameter (approximately 2mm), allowing for precise droplet delivery (1 drop x 0.05ml), thus minimizing essential oil waste (which can lead to higher unit prices).

Common sizes include 5ml, 10ml (suitable for single essential oils), and 30ml (suitable for blends or aromatherapy blends).

Mostly made of borosilicate glass (resistant to strong acids and alkalis) or PTFE (extremely chemically resistant).

Highly accurate graduations (e.g., ±0.05ml) make them suitable for sampling laboratory reagents.

Various sizes available: 10ml, 25ml, 50ml, and 100ml (suitable for different experimental volumes).

30ml essential oil glass bottle

 

 

 

Transparent self-sealing food packaging bags help ensure food export safety and beauty

With the rapid development of global food trade, food packaging must not only ensure safety, but also be aesthetically pleasing and convenient.

 

Our company specializes in the production and export of resealable plastic food bags, providing high-quality packaging solutions for global food export companies.

 

Our food-grade plastic packaging bags are made from safe and environmentally friendly PE, PET, and CPP materials that meet international food contact standards.

 

They are widely used for packaging nuts, dried fruits, candies, seasonings, tea, and baked goods. The transparent design allows consumers to easily view the contents,

 

boosting purchasing confidence. The self-sealing zipper allows for repeated opening and closing, extending food freshness.

 

In addition, we provide custom printing services (custom printed ziplock bags), customers can print brand logos, ingredient descriptions and QR codes on the bag,

 

which not only enhances the product image but also increases market recognition. We support different thicknesses, sizes and styles, suitable for retailers, food processing plants and e-commerce sellers.

 

 

Leveraging advanced production technology and rigorous quality control, our products are FDA and SGS certified and are popular in markets such as the United States,

 

Canada, Europe, the Middle East, and Southeast Asia. We also offer eco-friendly biodegradable ziplock bags to meet international green packaging needs.

 

We adhere to the core advantages of "high quality + fast delivery + professional foreign trade services" to help customers reduce procurement costs and improve market competitiveness.

 

If you are looking for a long-term and reliable food packaging supplier (plastic packaging supplier), we will be your best partner.

The Engineering of a 3-Layer MERINO Waterproof Jacket


The Light Shapewear Revolution How Comfort and Confidence Are Redefining the Market

 

In just a few years, shapewear has gone through a remarkable transformation. Once seen as restrictive garments for special occasions, shapewear is now embraced as part of everyday wardrobes. This shift, driven by brands like SKIMS, reflects deeper changes in consumer psychology, fashion expectations, and lifestyle needs.

 

OEM shapewear factory

 

Changing Consumer Mindsets

 

Today’s women don’t want shapewear that squeezes or feels uncomfortable. Instead, they are looking for light shapewear—garments that provide gentle shaping while allowing them to move freely throughout the day. The focus has shifted from “slimming down” to feeling confident, natural, and empowered.

 

This psychological change is one of the strongest reasons why shapewear is no longer niche—it has become a mainstream category.

 

The Appeal of Modern Shapewear

 

Seamless & Comfortable: Consumers prefer seamless shapewear bodysuits, shaping shorts, and wireless bras that feel like a second skin.

wholesale seamless shapewear bodysuits

 

Body-Inclusive Sizing: Wide size ranges and diverse skin-tone colors speak directly to consumers who want representation and inclusivity.

 

Everyday Versatility: Minimalist designs and neutral shades allow shapewear to double as outerwear, turning it into a true lifestyle product.

 

Confidence-Driven Fashion: Modern shapewear is less about hiding imperfections and more about enhancing natural curves and making women feel comfortable in their own skin.

 

ChuangRong’s Light Shapewear Series

 

customized shapewear bodysuits

 

At ChuangRong Apparel, we have closely followed this global trend and developed a series of light shapewear collections for brands and wholesalers. With more than 15 years of experience as an OEM shapewear factory, we offer:

 

Seamless Light Shapewear: Breathable, soft fabrics with targeted shaping.

 

Multi-Functional Designs: Bodysuits and shapewear shorts that can be worn as underwear or styled as daily wear.

 

Customized Shapewear Supplier Services: OEM & ODM solutions with flexible MOQs, private labeling, custom colors, and packaging.

 

Certified Quality: Production that meets ISO9001, BSCI, Oeko-Tex 100, GOTS, and GRS standards.

 

Our goal is to help brands capture the growing demand for everyday shapewear by creating products that align with modern consumer values: comfort, inclusivity, and style.

 

The rise of SKIMS highlights a global movement: shapewear is no longer a hidden accessory—it’s a fashion-forward, confidence-boosting essential. As consumers embrace light shapewear for daily wear, opportunities for brands have never been greater.

 

At ChuangRong Apparel, we empower brands to enter this fast-growing category with innovative, customizable, and high-quality shapewear solutions. Together, we can turn today’s shapewear trend into your next bestseller.

 

Contact us today to start building your best-selling lingerie collection with one factory by your side.

🔍 If you're looking for a reliable factory partner to support your lingerie or underwear business with custom sample development, flexible OEM/ODM solutions, and fast turnaround—let’s connect.

 

Email: Lexie@Sharicca.com

 

 

Glass bottle manufacturing process and supplier selection

For skincare brands, the texture and quality of glass bottles directly impact product premiums, and the manufacturing process is crucial to determining quality. Currently, mainstream glass bottle manufacturing processes primarily focus on blowing, tubing, and drawing. Different processes correspond to different product characteristics, necessitating distinct considerations when selecting suppliers.

1.The blowing process is an excellent representative of high-end skin care glass bottles. The blowing process is mainly used to manufacture bottles with complex shapes, thick walls, and high-end appearance. It is especially suitable for customized bottles, such as irregular essential oil bottles and retro cream jars.

When selecting a blow-molded bottle supplier, focus on three key aspects:

Mold development capabilities. A good supplier should possess independent mold design and processing capabilities, accurately reproducing details such as bottle body texture and bottle neck curvature based on the design draft, and maintain a mold-making cycle within 15-20 days to avoid delays in product launch.

High-end pigment reserves determine visual quality, and the addition of metal oxides creates premium colors like amber, cobalt blue, and emerald green. Suppliers must have a stable pigment supply chain to ensure consistent color during mass production, pass sun and abrasion resistance tests, and resist fading over time.

Small-batch flexible production capacity is adapted to the needs of start-up brands. Many start-up brands only need 500-1000 units in the trial production stage. Suppliers need to support small-batch customization and ensure that the wall thickness and sealing of each batch of products are consistent to avoid cost waste due to high production capacity thresholds.

2. The controlled process is more suitable for standardized, small-volume glass bottles, such as 10-30ml serum bottles and sample bottles. Because the process flow is relatively fixed, supplier selection should focus on three key points:

The source of the glass bottles directly affects the basic quality. Suppliers using high borosilicate glass are preferred. This type of glass is resistant to temperature fluctuations and corrosion, and can prevent essential oils and other ingredients from reacting with the glass. It is also important to confirm whether the glass bottles meet FDA, REACH, and other compliance standards.

The accuracy of flame processing determines the safety of the bottle mouth. The bottle mouth of the control bottle needs to be flame polished. High-quality suppliers can ensure that the bottle mouth is free of burrs, has uniform wall thickness, feels smooth when rubbed with fingers, and has clear sealing threads, and does not leak after being matched with the bottle cap.

The level of aseptic workshop is a rigid requirement for skin care product packaging, especially for sterile essences and ampoules. Suppliers must have a Class 10,000 aseptic workshop and be able to provide workshop inspection reports to ensure that there is no microbial contamination during the production process and to avoid product deterioration.

3.The drawing process mainly produces large-scale, low-cost conventional glass bottles, such as 100-200ml toner bottles and lotion bottles. When selecting a supplier, you need to pay attention to the scale production capacity:

The scale of the melting cellar determines the stability of production capacity. Large melting cellars can produce 50,000 to 100,000 pieces of glass per day, which can meet the long-term supply needs of established brands and avoid stock outs during peak seasons. At the same time, the raw material utilization rate of the melting cellar must be confirmed to reduce glass waste and lower costs.

The degree of automation impacts product consistency. Highly automated production lines can precisely control bottle height, diameter, and wall thickness to within ±0.1mm, eliminating dimensional deviations caused by manual production and ensuring the proper fit of the cap.

Environmental certification doesn't directly impact product quality, but it does impact compliance across the entire supply chain. Suppliers must be ISO 14001 certified and meet standards for wastewater and exhaust gas treatment during production to avoid production halts due to environmental issues, which could impact delivery times.

200ml toner glass bottles

In short, blown bottles rely on customization capabilities, tube-formed bottles on detail precision, and drawn bottles on scale efficiency. When selecting a supplier, you must first clarify the process requirements for your product, then conduct targeted verification of key dimensions. If necessary, request samples for sealing and drop resistance testing. Compliance documents and production cycles must also be verified. Only then can you select a partner that meets your quality requirements while also aligning with your cost and production needs.