Zhongxin supplies international packaging groups and serves end-use applications for leading foodservice, retail, and supermarket brands.
This article focuses on capacity and food applications. For the canonical size table, exact dimensions, and 6-inch vs 8-inch vs 9-inch specifications, use Zhongxin’s clamshell container sizes guide.
Many buyers search for 6-inch, 8-inch or 9-inch clamshell containers as if size alone decides the purchase. In practice, the correct bagasse clamshell depends on usable interior space, food height, lid closure, portion weight, nesting, carton quantity and whether the meal is served hot, cold, dry, oily or wet.
This guide helps importers, distributors, US foodservice buyers, QSR chains, school foodservice teams, supermarket deli counters and airline catering suppliers match common clamshell sizes to real menu applications. Zhongxin’s related product families include food packaging, bagasse tableware and compostable clamshell containers.
| Clamshell Size | Typical Food Applications | Buyer Risk to Check | Best Customer Type |
|---|---|---|---|
| 6-inch bagasse clamshell | Small sandwiches, muffins, desserts, side salads, fruit portions, kids snacks and airline snack service. | May be too shallow for tall bakery items or stacked sandwiches. | Airline catering, school snacks, cafes, bakeries and deli side programs. |
| 8-inch bagasse clamshell | Burgers, wraps, standard sandwich meals, fries, breakfast items and compact QSR entrees. | Food may press against the lid if the burger or sandwich is tall. | QSR chains, restaurants, delivery kitchens and distributors. |
| 9-inch bagasse clamshell | Large burger meals, entree salads, grilled protein meals, pasta-style meals, combo plates and supermarket deli sets. | Can waste space if used for small portions; carton cube may increase. | Supermarket deli, meal prep, catering, distributor bulk assortments and higher-portion restaurants. |
Two clamshells with the same nominal size can perform differently because wall angle, lid shape, rim structure and bottom depth change the usable capacity. A buyer should not approve a bulk order only from a catalog size. Ask for product drawings or sample dimensions, then place the real food inside the container and close the lid.
For hot foods, the height of the food after packing matters as much as bottom area. A burger with a tall bun, a grilled chicken salad with leafy greens or a muffin with a dome may look acceptable when the lid is open but deform when the lid closes. This is especially important for school foodservice and airline catering, where meals may be stacked or loaded into carts.
| Check Item | What to Test | Why It Affects Procurement |
|---|---|---|
| Food footprint | Place the full menu item in the bottom cavity without squeezing. | Prevents overbuying a larger size or under-sizing a key SKU. |
| Food height | Close the lid over the tallest item and check deformation. | Protects burgers, sandwiches, bakery items and salads during delivery. |
| Moisture and oil | Hold hot food for the expected service time. | Helps confirm whether the size, material and coating suit the food type. |
| Stacking | Stack filled samples as they would be stored or transported. | Important for QSR, school meals, catering and delivery staging. |
| Carton quantity | Compare pieces per case and carton dimensions. | Prevents a larger size from increasing warehouse cost unexpectedly. |
| Documents | Match the exact product family to required files. | Supports US, EU and distributor compliance reviews. |
Choose a 6-inch clamshell when the buyer needs controlled small portions, snack meals or compact catering service. Choose an 8-inch clamshell when the menu is centered on standard burgers, sandwiches and single-person QSR meals. Choose a 9-inch clamshell when the menu needs more surface area, larger salads, full entree portions or combo meals.
The right size should also align with compliance and market requirements. US buyers can review FDA information on food-contact substances. European buyers may also review the European Commission’s food-contact material overview at Food Contact Materials. If BPI-listed compostable products are required, verify the supplier in the BPI official directory.
Do not select size from the product name alone. Send Zhongxin the target food, portion weight, hot or cold use, destination market, packing method and annual volume. The team can help compare available molds, sample options, carton packing and documents through the contact page.
Often yes, but buyers should test the actual burger height, fries portion and lid closure. A tall burger or larger combo meal may require a 9-inch clamshell or a deeper design.
Yes, 6-inch clamshells can fit snack portions, desserts, small sandwiches and fruit servings. Buyers should confirm stacking, cart loading, temperature conditions and the required food-contact documents.
PFAS-free status should be confirmed by product family and order. Buyers should request supplier declarations and any relevant third-party test reports before placing a bulk order.
Yes, buyers can request samples in multiple sizes to compare menu fit, lid closure, stacking and carton efficiency. Include the destination market and compliance files needed, such as FDA, LFGB, BPI or SGS documents.
