Choosing a food container starts with one question that has nothing to do with plastics: what does the food actually need to survive? A chilled salad, a hot rice box, a frozen lasagna heading from the freezer to the oven, and a compostable deli bowl each ask for a different resin. Get the match right and the pack protects the product, passes inspection, and reheats without warping. Get it wrong and you pay for it in leaks, complaints and returns.
This guide walks through the six food-grade resins we mold every day, what each one is good at, and a simple way to decide. The goal is not to crown one winner. It is to help you brief a custom food packaging manufacturer with the right material in mind so your first samples land close to production.
Start With the Job, Not the Material
Before you compare resins, write down four things about the product: its temperature journey, the clarity you want, the container format, and what should happen to the pack after a meal. Almost every material decision falls out of those four answers.
- Temperature journey. Will the pack only be chilled, or does it get hot-filled, microwaved, or sent freezer-to-oven? This is the single biggest filter.
- Clarity. Does the buyer need to see the food through crystal-clear walls, or is a value display tray enough?
- Format. A thin display tray, a deep take-out bowl and a sealed ready-meal tray are formed differently.
- End-of-life. Recyclable, recycled-content, or industrially compostable — decide this early because it narrows the resin list.
PET — Crystal Clarity for Chilled Display
PET is the glass-clear choice for cold food that sells on how it looks. It holds shape up to about +60 C, which covers chilled and ambient use but not hot fill. Fruit and vegetable packs, salads, cake domes and deli boxes are its home, because shoppers buy with their eyes and PET keeps the food on full view. It is recyclable, and a recycled-content (rPET) option is available on our plastic lines.
Reach for PET when the product stays cold, clarity sells it, and nobody will ever microwave it in the pack.
PP and MFPP — Hot-Fill and Microwave for Take-Out
Polypropylene (PP) is the workhorse for hot food. It handles hot-fill and microwave duty up to about +110 C, so restaurant meals, soups and take-out rice boxes go straight from kitchen to customer to microwave without softening. It is recyclable and a little more flexible than PET, which helps with deep bowls and snap-on lids.
When a meal program means the same container gets reheated again and again, microwave-rated MFPP steps up to roughly +130 C for repeat reheats. Choose PP for everyday hot take-out, and MFPP when the pack is built to be reheated many times.
PS — Value Display Trays for Retail
Polystyrene (PS) is the cost-efficient display tray for retail shelves. Rated to about +70 C, it is made for cold and ambient presentation rather than heating. Meat and produce trays and supermarket display packs use it because it forms cleanly at high volume and keeps unit cost low. It is recyclable within standard PS streams.
Pick PS when you need a high-volume retail display tray and heating is not part of the product's life.
CPET — Freezer-to-Oven for Ready Meals
CPET is the specialist for the toughest temperature journey in food packaging: freezer to oven. It performs across roughly -40 C to +220 C, so a frozen ready meal can go from the cabinet straight into a conventional oven in the same tray. That single property makes CPET the default for frozen and ready-to-eat shelves, and it is recyclable.
If the pack has to be frozen and then oven-heated, CPET is usually the only resin on this list that does both.
PLA and Biodegradable — Plant-Based and Compostable
For brands that lead with sustainability, the PLA and biodegradable line is plant-based and industrially compostable. It suits cold and ambient formats — deli bowls, cold cups and salad packs — where a compostable end-of-life matters to the buyer. Across our plastic lines we also offer a 30% recycled-content option, and our roadmap puts half of capacity on biodegradable material by 2025 with a target of zero plastic to landfill by 2030.
Choose PLA when the compost story is part of the product promise and the food stays cold.
Side-by-Side: Temperature, Clarity and End-of-Life
The same six resins, lined up against the questions buyers actually ask:
| Material | Temperature range | Clarity | Best for | End-of-life |
|---|---|---|---|---|
| PET | Chilled to about +60 C | Crystal-clear | Fruit, salad, cake, deli display | Recyclable (rPET option) |
| PP | Hot-fill / microwave to about +110 C | Translucent | Restaurant and take-out hot food | Recyclable |
| PS | Display to about +70 C | Clear to opaque | Meat, produce, supermarket trays | Recyclable |
| CPET | About -40 C to +220 C | Opaque | Frozen and freezer-to-oven meals | Recyclable |
| MFPP | Microwave to about +130 C | Translucent | Repeat-reheat meal programs | Recyclable |
| PLA / Bio | Cold and ambient | Clear to natural | Compostable deli and cold packs | Industrially compostable |
Every one of these is food-contact safe and BPA-free. The differences are about heat, clarity and end-of-life, not safety.
Compliance: What "Food-Grade" Actually Means
Food-grade is not a slogan; it is documentation. All six resins are produced to FDA and LFGB food-contact compliance and are BPA-free, and our quality system runs to ISO 9001 with SGS, TUV, LFGB and EU food-contact testing behind it. When you evaluate any supplier, ask for the test reports by material and application, not a generic certificate. Migration testing in particular should match the food type and the temperature the pack will see, because a tray that is safe cold may behave differently when it is heated.
The short version: confirm the resin is rated for your temperature journey, then confirm there is paperwork that proves it for your food.
From Material Choice to Custom Production
Once the resin is settled, the rest is production. We run a vertically integrated floor — from raw material to sheet to precision tooling and finished container — with mold precision to 0.01 mm and a 99.7% quality pass rate across a 40,000 m² plant. For branded programs, design drafts come back within 72 hours, with Pantone-matched color and high-resolution logo printing, and the integrated workflow can cut development time by up to 40%.
Practically, that means you can move from "PET for the cold salad, CPET for the frozen meal" to tooled, printed, OEM food container production without juggling separate sheet, tooling and printing vendors.
A Simple Way to Decide
If you only remember one thing, make it this short path:
- Cold and needs to look perfect? PET.
- Hot take-out, microwaved? PP — or MFPP if it is reheated again and again.
- High-volume retail display tray? PS.
- Frozen and then oven-heated? CPET.
- Compostable story, cold food? PLA / biodegradable.
Start from the food's temperature journey, layer in clarity and format, and decide end-of-life early. Do that and your material brief will be right before a single sample is tooled.
Conclusion
There is no best food packaging material, only the right one for a given product. PET sells chilled food on clarity, PP and MFPP carry hot and reheated meals, PS keeps retail display affordable, CPET owns the freezer-to-oven journey, and PLA answers the compost question for cold formats. Match the resin to the job, confirm the food-contact paperwork, and you have a pack that protects the product and passes inspection. When you are ready to turn that choice into tooled, branded containers, a food-grade packaging supplier can take it from spec to first samples.