Zhongxin supplies international packaging groups and serves end-use applications for leading foodservice, retail, and supermarket brands.
This sourcing guide covers supplier checks and purchase planning. For exact dimensions, capacities, and 6-inch vs 8-inch vs 9-inch specifications, use Zhongxin’s clamshell container sizes guide.
When a plastic ban notice arrives, the first question for a purchasing manager is simple: what can replace the current EPS or PP clamshell boxes within three months? Many brands start looking for a compostable clamshell, then discover that the market is full of different materials, forming processes, certifications, and price levels.
A bagasse clamshell can be a strong replacement, but not every supplier offers the same quality. Some products are dry pressed, some are wet pressed, some have full compostability documents, and some come with only a vague “eco-friendly” claim. Choosing the wrong clamshell container can create food safety issues, delivery complaints, certification gaps, and brand damage.
This guide explains how to source bagasse clamshell containers for takeaway, deli, fast food, salad, and group meal delivery. It covers sizing, process selection, performance comparison, MOQ, pricing, certifications, supplier evaluation, and Zhongxin’s production advantages.
A Bagasse Clamshell Container is a disposable food container made from sugarcane fiber, also known as bagasse. Bagasse is the fibrous residue left after sugarcane juice extraction, and it can be converted into molded fiber packaging through a heat-and-pressure forming process.
China produces more than 10 million tons of bagasse each year. In the past, large volumes of bagasse were burned or discarded. Today, it is widely used as a plant fiber packaging material for takeaway containers, trays, bowls, plates, and other foodservice items.
A typical clamshell container uses a hinged lid and base structure. The opening angle can reach more than 120 degrees, making it easy for users to access food. The lid edge usually includes a locking structure, giving better closure than ordinary paper boxes.
Higher-end models may include anti-slip texture, anti-scald handling areas, reinforced corners, and deeper compartments. A compostable clamshell made from 100% bagasse fiber contains no plastic film and no PFAS（全氟和多氟烷基物质）when properly manufactured and verified.
Under commercial composting conditions, qualified bagasse tableware can break down into water, carbon dioxide, and biomass within 90-180 days. Compared with petroleum-based plastic packaging, this creates a more circular route for foodservice packaging disposal.
Bagasse clamshell containers are usually divided into three main size groups. Buyers should select size by food type, portion weight, sauce level, compartment needs, and delivery stacking conditions.
| Size | Inner Cavity Size, Reference | Best Use Cases | Recommended Format |
|---|---|---|---|
| 6 inch, approx. 15 cm | 140 × 100 × 50 mm | Sushi, light meals, single-person sets | Mainly 1-compartment |
| 8 inch, approx. 20 cm | 180 × 150 × 45 mm | Fast food, stir-fried dishes, staff meals | Mainly 1-compartment or 2-compartment |
| 9 inch, approx. 23 cm | 210 × 160 × 50 mm | Large portions, combo meals, party sets | Mainly 2-compartment or 3-compartment |
For takeaway fast food, 8-inch 1-compartment or 8-inch 2-compartment products are usually the safest starting point. The size works well for fried rice, noodles, stir-fried dishes, and a small side dish.
Wet-pressed models with smoother surfaces can reduce oil penetration and improve food presentation. They are often suitable for high-oil Chinese food and fast-moving takeaway menus.
For deli, braised meat, and ready-to-eat cooked food, 9-inch 2-compartment or 3-compartment products are more practical. These foods often carry more sauce, so deeper compartments help reduce leakage and cross-contamination.
Dry-pressed models usually have stronger edges and better stacking performance. They are suitable when the package needs to survive delivery, shelving, and stacked transport.
For salad, sushi, and light meals, 6-inch 1-compartment or 8-inch shallow-lid models are common choices. These products usually require cleaner visual presentation and stable portion control.
A compostable clamshell with a shallow lid can make the product look lighter and cleaner on shelves. This is useful for retail display, convenience stores, and health-focused food brands.
For group meal delivery, 9-inch 3-compartment models are usually preferred. Three independent compartments can separate rice, main dishes, and sides, reducing odor transfer and sauce mixing.
Buyers should choose models with leak-resistant rim designs. For high-volume canteen and group meal projects, lid closure strength and stacking stability should be tested before bulk ordering.
This is one of the most common questions in sourcing. Dry pressing and wet pressing are two different forming routes, and each has its own best-use scenario.
Dry Pressing（干压工艺）forms bagasse fiber under high pressure inside the mold. The moisture content is usually controlled at 8%-12%. The product has higher density, cleaner edges, better dimensional stability, and stronger corner structure.
Wet Pressing（湿压工艺）injects fiber slurry into the mold and forms the product through hot pressing. The surface is smoother and more refined, and the process can support more complex embossing and printing. The density is usually slightly lower than dry-pressed products, but the visual finish is better.
Zhongxin’s self-developed mold system can achieve ±0.5 mm precision for dry-pressed products. This is useful when buyers require stable lid fit, automated packing, or consistent stacking.
| Comparison Dimension | Dry Pressing | Wet Pressing |
|---|---|---|
| Appearance | Visible fiber texture, matte finish | Smooth surface, suitable for complex patterns |
| Dimensional Accuracy | ±0.5 mm with Zhongxin molds | ±1-2 mm |
| Edge Strength | High, corners are less likely to collapse | Medium |
| Printing Compatibility | Suitable for single-color screen printing | Supports four-color printing and complex graphics |
| Unit Price Range | RMB 0.15-0.35 per piece | RMB 0.25-0.60 per piece |
| Best Use Cases | Deli, group meals, takeaway fast food | Chain brands, light meals, retail display |
If your brand values packaging appearance and is willing to pay for design, wet pressing is usually the better route. If your use case is high-frequency takeaway, cost-sensitive delivery, and practical performance, dry pressing is often the better value.
Zhongxin operates both dry press and wet press production lines. This allows buyers to compare samples and choose the right process instead of sourcing from multiple factories.
Many foodservice brands still ask why they should move away from mature EPS or PP packaging. The answer comes down to heat resistance, oil resistance, compression strength, and environmental profile.
A bagasse clamshell can resist heat up to about 100-120°C, which is suitable for hot food takeaway. EPS（发泡聚苯乙烯）usually handles only around 70-80°C and may soften or deform under hot food conditions. PP（聚丙烯）has better heat resistance, but it does not naturally degrade.
For oil resistance, plant fiber structure can help reduce surface oil penetration when properly treated. Test data in the source article indicates that bagasse clamshells soaked in 35°C oil for 2 hours showed no obvious oil penetration. PE-coated paper boxes may delaminate when exposed to oil.
For compression strength, dry-pressed bagasse clamshells can reach about 800-1000 N/m². This is close to ordinary PP plastic in practical packaging use. Thin-wall wet-pressed products may be lower, so buyers should avoid excessive stacking unless the model is tested.
The environmental difference is the main driver. A qualified compostable clamshell made from bagasse can break down in commercial composting conditions within 90-180 days. Plastic clamshells may take 200-500 years to break down in the natural environment.
| Performance Indicator | Bagasse Clamshell | EPS Foam Plastic | PP Plastic |
|---|---|---|---|
| Heat Resistance | 100-120°C | 70-80°C | 100-120°C |
| Oil Resistance | Excellent | Medium, oil penetration risk | Excellent |
| Compression Strength | Good to excellent | Poor | Excellent |
| Degradation Period | 90-180 days | 200+ years | Not naturally degradable |
| Environmental Certification | Available | Not available | Not available |
The MOQ for bagasse clamshell containers varies by supplier, process, mold status, certification needs, and printing requirements. Buyers should separate public-mold products from private-mold custom products when comparing quotations.
Standard public-mold products usually start from 5,000-10,000 pieces per SKU. Custom-mold products usually require 20,000-50,000 pieces per SKU. Large customers with exclusive molds may negotiate 100,000 pieces or more.
Reference price range for 2026 market conditions, for quotation discussion only:
Dry-pressed 6-inch 1-compartment: RMB 0.12-0.18 per piece
Dry-pressed 8-inch 2-compartment: RMB 0.18-0.28 per piece
Dry-pressed 9-inch 3-compartment: RMB 0.25-0.40 per piece
Wet-pressed 8-inch 1-compartment: RMB 0.22-0.35 per piece
Wet-pressed 9-inch 2-compartment branded model: RMB 0.35-0.60 per piece
Final price is affected by size, compartment count, forming process, certification requirements, printing method, and delivery schedule. Certified products may add 5%-15% to the price, and urgent orders may add 10%-20%.
Zhongxin offers flexible trial-order support, with MOQ negotiable from 5,000 pieces for selected models. This helps foodservice brands move from sample testing to batch purchasing without committing too early.
If your brand wants to label a product as compostable, certification is not optional in many export markets. Buyers should confirm which certification the destination market requires before placing a bulk order.
Biodegradable Products Institute（BPI）is one of the most recognized compostability certification bodies in North America. BPI certification is based on ASTM D6400 and related standards, requiring products to break down in commercial composting facilities.
Several U.S. states, including California, Washington, and New York, have introduced legislation or market rules around certified compostable foodservice packaging. For a compostable clamshell entering the U.S., BPI documentation is often the first document buyers request.
EN 13432 is the harmonized European standard under the Packaging and Packaging Waste Directive framework. It requires products to meet controlled composting, disintegration, ecotoxicity, and heavy metal requirements.
Products certified under EN 13432 may use the Seedling Logo in the European market when properly licensed. For EU buyers, EN 13432 is one of the most important documents for compostability claims.
TÜV Austria’s OK Compost program includes several certification routes:
OK Compost HOME: for degradation under home composting conditions
OK Compost INDUSTRIAL: for industrial composting conditions
OK Compost SOIL: for degradation in soil
Asian markets do not yet have one unified compostability certification system. In China, GB/T 28206-2011 for compostable plastic materials and products is being promoted, while buyers often also request third-party testing reports.
If your product is exported to Europe or North America, first confirm whether the supplier already holds BPI, EN 13432, or OK Compost certification. If the product is for domestic use only, recognized third-party test reports may be sufficient depending on the customer requirement.
Zhongxin’s existing products have obtained mainstream certifications such as BPI, EN 13432, and OK Compost. Complete certification files can be provided for buyer review.
Zhongxin’s strength in bagasse foodservice packaging comes from capacity, process flexibility, mold precision, customer experience, and R&D capability. For buyers, these are practical sourcing advantages, not only factory claims.
Zhongxin operates both dry press and wet press production lines. Total annual capacity exceeds 200,000 tons across four production bases.
This means buyers do not need to switch suppliers when changing process routes. From small trial orders to large-volume production, Zhongxin can support different product lines under one supplier system.
Zhongxin’s self-developed molds can reach ±0.5 mm precision, higher than the common industry level of ±1-2 mm. High mold precision supports stable dimensions, better lid fit, and fewer problems caused by deformation.
For clamshell packaging, mold precision directly affects closure, stacking, and user experience. This is a critical point for delivery brands and retail food packaging.
Zhongxin has served major retail and foodservice brands. Sam’s Club, Hema Fresh, and Burger King have used Zhongxin’s bagasse food packaging in selected product lines.
These customer cases help verify Zhongxin’s ability in large-order delivery, quality control, certification support, and production coordination. For new buyers, this lowers supplier evaluation risk.
Zhongxin has a 136-person R&D team and 115 patents. The team continues to invest in fiber material modification, mold process optimization, product structure improvement, and performance customization.
For customers with special requirements, Zhongxin can support customized R&D. This includes performance tuning for oil resistance, stacking, heat resistance, lid fit, and private-label design.
Before confirming a supplier, buyers should check each item below. This list helps avoid common sourcing mistakes.
□ Material confirmation: Is the product made from 100% bagasse? Does it contain plastic film or PFAS?
□ Size and specification: Do the inner cavity size, depth, and compartment count match the target food application?
□ Process selection: Dry press or wet press? Has the buyer approved physical samples?
□ Certification documents: Are target-market certifications complete, such as BPI, EN 13432, or OK Compost?
□ Price terms: Are MOQ, unit price, delivery time, and payment terms clear?
□ Sample testing: Does the product need heat resistance, oil resistance, leakage, or compression testing?
□ Mold status: Is it a public mold or private mold? Who owns the private mold?
□ Capacity matching: Can the supplier’s capacity match your order scale?
□ Delivery commitment: What are the standard lead time and urgent-order lead time?
Sourcing bagasse clamshell containers is not just a price comparison. Buyers need to evaluate material, process, certification, capacity, mold capability, lead time, and supplier service together.
The right supplier can help your plastic replacement plan land smoothly. The wrong supplier may create quality failures, delayed shipments, missing certifications, and customer complaints.
Zhongxin has deep experience in plant fiber foodservice packaging. With dry press and wet press dual-process capability, high-precision self-developed molds, complete international certifications, and service experience with brands such as Sam’s Club, Hema, and Burger King, Zhongxin is positioned to support both trial orders and large-scale procurement.
If you are looking for a reliable clamshell container supplier, contact Zhongxin to request free samples and a detailed specification sheet.
Most bagasse clamshell containers can handle microwave reheating at 100-120°C. Heating time should usually stay within 3 minutes to avoid scorching or fiber dehydration. Buyers should confirm whether the specific SKU is labeled microwave safe and request heat-resistance test data before bulk ordering.
Wet-pressed products are usually 30%-50% more expensive than dry-pressed products. The higher cost comes from equipment investment, surface quality requirements, and process control. If your brand values premium appearance, detailed printing, or retail display, wet pressing may justify the additional cost.
Yes. Zhongxin offers small-batch trial orders, with MOQ negotiable from 5,000 pieces per SKU for selected models. Buyers are encouraged to test samples first for heat resistance, oil resistance, lid closure, stacking, and food compatibility before scaling up to larger production orders.
For the U.S. market, BPI certification is recommended for compostable claims, and FDA food-contact compliance should also be verified. Buyers should request certificates, test reports, and product coverage details. Some states may have stricter requirements for compostable foodservice packaging.
Bagasse, bamboo pulp, and wheat straw each have different strengths. Bagasse has fine fiber and stable raw material supply, making it suitable for smooth foodservice packaging at scale. Bamboo pulp has strong toughness, while wheat straw is coarser and often used for lower-end products.
