Can I freeze food in a pyrex dish with rubber cover?

It's not recommended to freeze food in a Pyrex dish with a rubber cover.

- Thermal shock: Pyrex dishes are made of glass, which is susceptible to thermal shock. This means that if the dish is exposed to a sudden change in temperature, it can shatter. Freezing food in a Pyrex dish and then thawing it quickly in the microwave or on the stovetop can cause thermal shock and cause the dish to break.

- Rubber covers are not airtight. This means that air can get into the dish and cause freezer burn. Freezer burn can make food tough, dry, and tasteless.

- The rubber cover may melt or warp when frozen. This can make it difficult to remove the cover and can also contaminate your food.

If you want to freeze food in a glass dish, it's best to use a tempered glass dish that is designed for freezing. These dishes are more resistant to thermal shock and are less likely to break. You should also cover the dish with plastic wrap or aluminum foil to create an airtight seal.