Onyx Stainless Steel Airtight Container
All-stainless container with a stainless lid and a silicone gasket for an airtight seal - steel food contact, no plastic anywhere.
The verdict: Silicone only
Body and lid are stainless steel; the airtight/leak-resistant versions seal with a silicone gasket in the lid. Food touches only steel; the sole non-steel part is the silicone seal. (Plain non-sealing steel tins from Onyx with no gasket are fully plastic-free.)
What it's made of
| Part | Material | Food contact |
|---|---|---|
| container body stainless steel; specific grade not stated by Onyx | Stainless Steel grade unspecified | Yes primary |
| lid stainless steel; specific grade not stated by Onyx | Stainless Steel grade unspecified | Yes primary |
| gasket (airtight models) silicone sealing ring on leak-resistant/airtight lids; plain tins omit it | Silicone | Yes seal |
Straightforward all-steel storage with a clamp lid. A clean choice for anyone who wants steel rather than glass - lighter and unbreakable - in the airtight, leak-resistant format. Onyx also sells plain lidded tins for dry storage.
Pros
- Steel food contact, no plastic; unbreakable and light
- Airtight versions genuinely leak-resistant
- Dishwasher safe
Cons
- Not microwaveable
- You can't see the contents
Common questions
Does the Onyx Stainless Steel Airtight Container have plastic in it?
No petroleum plastic touches your food. On the Onyx Stainless Steel Airtight Container, the gasket (airtight models) is silicone, and the rest of the food path is stainless steel.
What is the Onyx Stainless Steel Airtight Container made of?
Part by part, the Onyx Stainless Steel Airtight Container is: container body — stainless steel; lid — stainless steel; gasket (airtight models) — silicone.
Does the Onyx Stainless Steel Airtight Container have silicone in it?
Yes — the gasket (airtight models) is silicone on the Onyx Stainless Steel Airtight Container. It is a seal rather than a surface your food sits against, which is stainless steel.
Is the Onyx Stainless Steel Airtight Container BPA-free?
No plastic touches your food on the Onyx Stainless Steel Airtight Container — the food path is stainless steel and silicone — so BPA, which comes from polycarbonate and epoxy plastics, is not in play here.
Categories: Food Storage Containers
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://onyxcontainers.com Onyx describes all-stainless containers with stainless lids; airtight models use a silicone gasket
- review https://plasticdetox.org/articles/best-plastic-free-food-storage-containers.html independent roundup listing Onyx stainless containers as a plastic-free/silicone-sealed food storage option
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.