A stainless steel container can still include plastic or silicone in its lid, closure or seal. Check every part that touches food and follow the manufacturer's storage, heating and care instructions.
Start with the complete materials list. A container may have a stainless body and a plastic lid, silicone gasket, latch or handle. Check how each part is used, then follow the maker’s instructions for food contact, heating, storage and cleaning.
Component checklist
| Part | What to verify |
|---|---|
| Container body | Stainless grade or material description, capacity and intended food use |
| Lid | Plastic, metal, bamboo, silicone or another material |
| Seal or gasket | Material, whether it is removable and how it is cleaned |
| Latch or handle | Material and whether it contacts food |
| Temperature use | Storage, freezer, oven or microwave instructions for each component |
| Care | Hand-wash or dishwasher directions, replacement parts and warranty |
The FDA explains that food-contact substances include materials used in packaging, cookware, food preparation surfaces and containers. Their safety review is tied to intended use and conditions. That is why a product’s material name is not a substitute for its instructions.
Choose a container for your routine
- Decide what you will store and the amount of food each container should hold.
- Check the maker’s material list for the body, lid, seal and latch.
- Verify whether the exact product is intended for the food and temperature use you need.
- Check whether the lid can be removed for cleaning and whether seals are replaceable.
- Confirm the washing and heating instructions before putting a container in an appliance.
Look beyond marketing terms such as “plastic-free lid.” Confirm the component list and whether a seal or closure still contains another material. IKEA’s product listings, for example, identify some containers as stainless steel with plastic lids, so the material description should cover the full assembly.
For another storage material comparison, see glass vs stainless steel containers. Check food-contact silicone and beeswax wrap care, or browse food storage.
FAQs
Does stainless steel contain a plastic coating?
The material name alone does not answer that. Check the product’s construction details and contact the maker if a coating is not described.
Are bamboo lids fully plastic-free?
Check whether the lid uses a silicone seal, coating or other closure component. Read the full component list.
Can a metal container store acidic food?
Use only containers whose maker specifies the intended food types and conditions. If the use is not described, ask the manufacturer.
Where should I look for replacement seals?
Check the manufacturer’s parts and support pages for the exact product number.
Sources
- FDA: Food packaging and substances that contact food
- FDA: Food-contact substances and intended use
- IKEA: Example stainless steel container with plastic lid
New guides in this topic
Common questions
Are all stainless steel containers plastic-free?
No. Some have plastic lids, silicone seals or other components. Check the materials list for the container and each accessory.
Can I microwave a stainless steel container?
Follow the product and appliance manuals. Do not assume a container or lid is microwave-safe based only on its material name.
How do I know if a container is food-safe?
Use products described for food contact and follow the manufacturer's intended-use instructions. FDA rules evaluate food-contact substances for their intended conditions of use.
Can I put a stainless steel container in the dishwasher?
Care instructions vary by container and lid. Check the maker's directions for each removable component.