Yes, you can put bowls in the freezer. However, it is important to note that not all bowls are freezer-safe. If you're unsure whether or not your bowl is freezer-safe, check the manufacturer's instructions.
When freezing bowls of food, it is important to use a shallow bowl so that the food freezes quickly and evenly. It is also important to leave space at the top of the bowl for expansion as the food freezes. Once frozen, wrap the bowl tightly with plastic wrap or aluminum foil to prevent freezer burn.