You can keep aside those plastic ice-cream and take-out containers. Opt for our non-toxic long-lasting borosilicate glass bowls. Our glass mixing bowls do triple duty you can heat and store food in them and also use them as serving bowls. Just follow our list of Dos & Don'ts to ensure you get the optimal use out of them. Dos Use in electric oven convection oven microwave oven fridge and freezer. Pre grease your bowl before pouring in food meant for baking. Pre heat oven before use for best result. Allow frozen bowl to reach to warm a bit before putting it in the oven for reheating (however straight from the fridge to the oven is ok) Allow hot bowl with food to cool a bit before putting it into the freezer (putting a hot bowl into the fridge however is ok) Wash with soap and a soft sponge or in the dishwasher. Don'ts Do not use the plastic lid in conventional oven or microwave oven. It is not recommended that plastics be heated as research shows that the plastics leach chemicals at a higher rate when heated. Do not use over direct flame. Do not allow the food to dry completely in the oven. Do not put the hot bowl on cold or wet surface. Do not use abrasive cleaners or scourers to ensure scratch free surface.