Not oven safe
Not oven safe
Do not put this in a conventional oven.
What it looks like
The oven outline with a cross through it.
What it means
It appears on microwave-safe plastic tubs more than anything else, and the pairing is the point: microwave heating warms the food while the container stays comparatively cool, whereas an oven heats the container directly to the air temperature. Polypropylene melts around 160 °C, well below a normal baking temperature. Ready-meal trays marked this way are usually CPET or aluminium if oven-safe, and PET or PP if not, and the two look almost identical.
Defined by Manufacturer declaration. Where a symbol differs between standards, the difference is described above rather than resolved — both versions are in circulation on real labels.
Other cookware and containers symbols
| Symbol | Means |
|---|---|
| Microwave safe | The maker states the material is suitable for heating food in a microwave. |
| Do not microwave | Do not heat this container in a microwave. |
| Dishwasher safe | The item survives a normal dishwasher cycle. Some versions specify the top rack only. |
| Not dishwasher safe — hand wash only | Wash this by hand. |
| Oven safe | The item can go in a conventional oven, up to the stated temperature if one is given. |
| Freezer safe | The container can be used in a freezer without cracking or failing. |
| Induction compatible | The pan has a ferromagnetic base and will work on an induction hob. |
| BPA free | The item contains no bisphenol A. It is a marketing claim, not a certification. |
| Do not use metal utensils | Use wood, silicone or nylon tools with this surface. |
Common questions
- What does the not oven safe symbol mean?
- Do not put this in a conventional oven.
- What does it look like?
- The oven outline with a cross through it.
Related pages
- Oven safe The item can go in a conventional oven, up to the stated temperature if one is given.
- Microwave safe The maker states the material is suitable for heating food in a microwave.
- Microwave safe The maker states the material is suitable for heating food in a microwave.
- Do not microwave Do not heat this container in a microwave.
- Dishwasher safe The item survives a normal dishwasher cycle. Some versions specify the top rack only.
- Not dishwasher safe — hand wash only Wash this by hand.
- Oven safe The item can go in a conventional oven, up to the stated temperature if one is given.
- Freezer safe The container can be used in a freezer without cracking or failing.
- Induction compatible The pan has a ferromagnetic base and will work on an induction hob.
- BPA free The item contains no bisphenol A. It is a marketing claim, not a certification.
- Do not use metal utensils Use wood, silicone or nylon tools with this surface.
Sources
- Typical range compiled from manufacturer specifications — At One Place