The storage containers are suitable for use in the refrigerator and freezer, the dishwasher, the microwave and the oven. They are also odor and stain resistant, easy to clean, great to keep your fridge tidy and keep the food fresh. There are a range of budget-friendly sizes in this containers set, rounds, rectangles, and squares - you can always find the right container for entertaining, serving, and bringing food to parties. TIPS: Remove the lids before placing the glass container in a microwave, oven and dishwasher.