The best microwavable container for a UK food business is a food-grade polypropylene tub with a tight, ventable lid, sized to the dish. Check for a microwave-safe mark on the base, ask your supplier for compliance documents, and test one sample with your heaviest, oiliest dish before you order cases.
Choosing microwavable food containers sounds simple until a curry leaks in a delivery bag or a lid warps in the microwave. This guide covers safety, lids, colour, materials, stains, freshness and sizes, so you can buy the right tub the first time.
Key takeaways
- “Microwavable” means built for microwave heat. It doesn’t mean oven safe or endlessly reusable.
- Colour doesn’t decide safety. Material and the label on the base do.
- Always check the lid separately from the base.
- Match the size to the portion, then test it with a real meal.
- Compare cost per unit, not just the price of the case.
What is a microwavable container?
A microwavable container is a food tub designed to heat in a microwave without melting, warping or passing unwanted substances into food. Most microwavable plastic containers are made from polypropylene (PP), a plastic that tolerates heat well, although you should confirm the material on each product listing.
Microwavable, reusable and oven safe are three different things. A tub can be fine for one reheat and still fail in an oven or after a few washes.
Which materials can go in the microwave?
Not every food tub is made for heat. Check the base marking on each type before you stock it.
| Material | Microwave? | Typical use |
|---|---|---|
| Polypropylene (PP) tub | Yes, if marked | Hot meals, curries, reheating |
| Clear cold-food tub | Usually no, check the label | Salads, fruit, cold deli food |
| Aluminium foil | Never | Oven and hot holding |
| Kraft board box | Only if the supplier says so | Dry or cold food; lined boxes for some hot food |
If you serve a mixed menu, keep hot and cold food in separate container ranges so staff don’t grab the wrong tub in a rush.
Are microwavable containers safe?
Yes. Microwavable plastic containers are safe when you use them as intended. Cancer Research UK says chemicals can pass from plastic into food when heated, but there’s no evidence this causes cancer. It also advises checking that a container says “microwave safe” before using it in the microwave.
In Great Britain, plastic that touches food is regulated, and local authorities enforce the rules, including through documentary checks. Buy food-grade containers from a supplier who’ll share the specification and compliance documents on request, and keep those documents on file in case an inspector asks.
What does “microwave safe” really mean?
It means the maker designed the container to cope with microwave heating in normal use. It doesn’t promise years of reuse, oven use or unlimited heating time. Look for a microwave symbol or the words “microwave safe” on the base.
The glass-and-fork symbol is a different mark. It shows a container is food-safe, which covers contact with food, not heat. If a tub has no microwave marking, don’t microwave it.
Is the lid microwave safe too?
Don’t assume so. A lid can be rated differently from the base, and some ranges sell bases and lids separately, so match each lid to its base and check its marking. A lid that sits loosely or has a vent lets steam out. A sealed lid traps steam and can warp or pop off.
A well-fitting microwave container with lid also keeps sauces inside the bag during delivery, which cuts complaints. Before each use, check that the lid has no cracks and snaps on all the way round.
Black or clear microwavable containers?
A black container is as microwave safe as a clear one if it’s food-grade and carries the right label. Colour is about looks and practicality, not safety.
| Factor | Black base | Clear |
|---|---|---|
| Look | Modern, hides stains | Shows the food inside |
| Microwave safety | Depends on material and label | Depends on material and label |
| Staining | Less visible | More visible |
| Recycling | Check local rules, as some sorting equipment struggles with dark pigment | Usually easier to sort |
| Best for | Hot dishes, curries, sauce-heavy meals | Salads, desserts, display |
Black vs Clear Microwavable Containers: Which Is Best?
Compare black and clear microwavable containers to understand their differences, benefits and suitability for takeaway, delivery and food storage.
Read the Comparison →So yes, you can reheat food in black plastic containers when they’re marked microwave safe. Our post on black vs clear microwavable containers compares the two in more detail.
Glass vs plastic for takeaways
Glass is excellent at home. For takeaway, it’s heavy, costs more and rarely comes back.
| Factor | Glass | Microwavable plastic |
|---|---|---|
| Weight | Heavy | Light |
| Cost | Higher | Lower in bulk |
| Breakage | Can chip or shatter | Less likely to break |
| Oven and freezer | Usually yes, check the label | No oven; freezer only if labelled |
| Stains and smells | Doesn’t hold them | Can stain and hold odours |
| Takeaway use | Rarely practical | Practical for delivery |
Our post on glass vs plastic containers covers the trade-offs for food businesses.
Do microwavable containers keep food fresh?
They help when the lid seals well, but they aren’t a preservation method. Let hot food cool briefly before you seal and chill it, avoid overfilling, and label tubs with the date. Crisp foods go soft in a sealed tub, so keep them separate or vent the lid. Follow your food safety plan for chilling and storage times.
Why does curry stain plastic containers?
Turmeric gets its colour from curcumin, which is oily and doesn’t dissolve in water. The pigment seeps into the plastic’s surface, and heat and fat make it hold on tighter.
To fix a stain, scrub with a paste of baking soda and washing-up liquid, follow with vinegar, then leave the tub in sunlight, which gradually breaks the pigment down. To prevent it, rinse soon after use and avoid abrasive pads. If a stain comes with a smell or cloudy plastic, replace the tub.
Which dishes suit which microwavable food containers?
Think about the food first. Soups, curries and sauce-heavy dishes need a deep tub and a lid that clicks shut, so nothing escapes in the bag. Fried or crisp food does better with a lid you can vent. Dishes with several parts, such as rice with a curry, work best in a compartment tub so the sauce doesn’t soak the rice. Dry food like pasta bakes is more forgiving, so a standard rectangular tub does the job.
What size microwavable container do you need?
Use these as starting points, then test a real portion.
| Size | Typical use |
|---|---|
| 12oz / 340ml | Small sides, sauces, desserts |
| 16oz / 456ml | Sides, snack portions |
| 24oz / 681ml | Standard single meal |
| 28oz to 32oz / 795ml to 906ml | Large meal, rice and curry |
| 38oz / 1079ml | Big portions, shared sides |
| 58oz / 1648ml | Sharing portions, family meals |
| 2 or 3 compartments (32oz to 38oz) | Rice and curry kept apart, mains with sides |
Ask your supplier for the capacity in millilitres as well as ounces, so you can compare ranges like for like.
How do you choose microwavable food containers for your business?
Run through this checklist before you place a bulk order:
- Food-grade and marked. Look for a microwave-safe mark on the base and ask for the specification.
- Lid included and fitting. A microwave container with lid should arrive as a matched pair. Check the lid is rated for the microwave and has a vent or loose-fit option.
- Wall thickness. Press the side and reheat a sample. Thin walls flex and warp sooner.
- Sizes you’ll use. Two or three sizes cover most menus and keep stock simple.
- Compartments. Use them for rice and curry, or any dish that shouldn’t mix.
- Cost per unit. Divide the case price by the case quantity. For example, a case of 150 rectangular black 24oz containers with clear lids was listed at £27.69 at the time of writing, about 18p each including the lid. Check the product page for current prices.
What mistakes should you avoid?
- Buying on case price alone. A cheap tub that warps costs more in complaints.
- Ignoring the lid. A good base with a poor lid still leaks.
- Putting plastic in the oven. Use foil for oven dishes.
- Telling customers to reheat twice. Reheat leftovers once, until steaming hot.
- Mixing up bases and lids. Label shelves clearly when sizes look alike.
- Skipping the sample test. Reheat one real portion twice before you buy a full case.
How do you order?
Orders placed before 12 noon Monday to Friday are delivered the next working day on the UK mainland. Delivery is free over £100 ex VAT, and multi-case pricing applies on bulk orders. See the full range of microwavable containers, or call 020 3411 2378 and we’ll help you match sizes to your menu.
Find the Right Microwavable Containers for Your Business
Shop microwavable food containers in a range of sizes and styles for takeaway meals, curries, meal prep and food delivery.
Shop Microwavable Containers →FAQs
1. Are microwavable containers safe?
Yes, when used as intended. Check the base for a microwave-safe mark, vent the lid and replace any container that is warped, cracked or badly scratched. Cancer Research UK says there is no evidence that chemicals from heated plastic cause cancer.
2. Is it safe to reheat food in plastic containers?
It’s safe in containers marked microwave safe. Don’t heat food in tubs with no marking, and don’t microwave a damaged container. Stir food halfway and check it’s steaming hot throughout before serving.
3. What does microwave safe mean on plastic containers?
It means the maker designed the container to withstand microwave heating in normal use. It doesn’t mean oven safe or reusable forever. Look for a microwave symbol or the words on the base, and check the lid’s marking too.
4. Can you microwave black plastic containers?
Yes, if they’re food-grade and marked microwave safe. Colour doesn’t decide safety, the material and label do. Read the base marking, use a vented lid and throw the container away once it warps or cracks.
5. Can you microwave a container with the lid on?
Only with the lid vented or resting loosely. A sealed lid traps steam and can warp or pop off. With any microwave container with lid, check the lid is rated for the microwave too, because lids and bases can be made differently.
6. What size container do I need for a takeaway meal?
A 24oz (681ml) tub suits a standard single meal. Choose 28oz to 32oz for rice and curry, and 38oz or more for large portions. Test one real portion before you buy a full case.
7. How do you remove curry stains from plastic containers?
Scrub with baking soda and washing-up liquid, follow with vinegar, then leave the tub in sunlight. Turmeric is oily and seeps into plastic, so rinsing soon after use helps. Replace any tub that also smells or turns cloudy.
8. How many times can you reuse a microwave container?
There’s no fixed number. Single-use tubs are made for one use, and heavy-duty ones may handle a few careful uses if the supplier says so. Stop when you see warping, cracks, scratches, stains or smells.