From freezer to hob to oven to table — all steel, even the lid.
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304 stainless steel
The body and friction-fit lid are 304 stainless steel. No silicone gasket. No plastic clip. No lining or coating where food touches.
| Feature | Loopware | Typical "SS" container | Plastic container | Glass container |
|---|---|---|---|---|
| Body material | 304 SS (lab-verified) | "304 SS" (claimed) | PP/PE plastic | Borosilicate glass |
| Lid material | 304 SS | Silicone + plastic or SS | Plastic | Glass + silicone |
| Synthetic contact with food | None | Silicone seal | Entire surface | Silicone gasket |
| Microwave safe | No | Some (lid off, if undented) | Not recommended | Yes (lid off) |
| Hob safe | Yes | Yes (lid off) | No | No |
| Oven safe | Yes | Lid off only | No | Lid off only |
| Leakproof | No | Yes | Yes | Yes |
| If dropped | May dent | May dent | May crack | May shatter |
| Nestable (same size) | Yes | Mostly no | Some | Mostly no |
| End-of-life material | Single-material steel | Mixed materials | Plastic | Mixed materials |
Product performance varies by construction and manufacturer. Follow the care instructions supplied with each product.
The everyday food cycle
Freeze batch cooking flat in the container. When it is time to reheat, remove or loosen the lid while cold, start on a low heat and bring the food fully up to temperature.
The same steel vessel can move through storage, reheating, serving and washing, with less decanting between containers.
A small detail that matters
If you prefer to reheat in your own pan, run the outside of the steel container briefly under the tap. Steel carries warmth quickly, helping the frozen block release without chipping at it.
It is a simple step, but a useful one when batch cooking is part of the weekly routine.
Designed for the cupboard
Same-size containers nest together when empty and the flat steel lids stack separately. The 1.0L container also nests inside the 1.6L container.
Capacity is engraved into the steel so the size mark cannot peel or wash away. Any lid of the same capacity fits its matching container size.
Before you buy
Steel is not microwave safe. Reheat on the hob or in the oven instead. The friction-fit lid has no watertight silicone seal, so keep the container level when liquid is inside.
Those are deliberate trade-offs of a single-material, all-steel design.
No. The friction-fit steel lid is designed for storage, reheating and nesting, not leakproof transport.
Yes. Start on a low heat, remove or loosen the lid while cold, and handle the hot steel with suitable protection.
Yes. We've tested Loopware on a gas hob using a heat diffuser (also called a simmer plate), placed between the flame and the container. It worked very well, giving gentler, more even heat while greatly reducing direct-flame discolouration. Please check that your hob manufacturer permits the use of a heat diffuser, use low to medium heat, and never heat the container empty.
No. Metal containers must not be used in a microwave.
It can, and that's completely normal. It's a heat change in the steel's protective oxide film where it meets the heat source — cosmetic, not a coating peeling away, and it doesn't affect cooking or any other function. It isn't a fault, and it won't scrub off with everyday cleaning, so there's nothing you need to do.
These two do come off. Cloudy white marks are minerals left when water or cooking liquid evaporates — they're alkaline, so soak them with diluted white vinegar and wipe away. Food stains and burnt-on black residue are acidic, so use bicarbonate of soda instead: wet the surface and sprinkle it on, or mix a little water into a paste and spread it over the mark. Leave it 10–30 minutes to loosen the bond, then wash the residue away with a gentle scrub such as a loofah; really stubborn marks can sit overnight. Avoid chlorine bleach, ordinary steel wool and harsh abrasive cleaners.
Yes. Same-size containers nest together, and the 1.0L body nests inside the 1.6L body. The flat lids stack separately.
Yes — and returns are free within 30 days of receiving your order. To return it, just contact us: we'll email you a prepaid returns label and refund you once your return is received.
You get the pack you select; UK delivery is free; your estimated delivery date is shown at checkout.
