Glass Meal Prep Containers - 12 Piece Set, Borosilicate Glass, High Heat Resistance (750 &deg;F), BPA Free, 100% Leak Proof - Microwave, Freezer, Oven & Dishwasher Safe - Glass 6+6 Set, by Popit! Popit Glass container set includes 2 square and 4 rectangular premium quality and durable containers with airtight lock down lids. The sizes are: 1.7cups(13.5oz), 2 x 3.8cups(30.4oz), 6.8cups (54.1oz), 1.5cups (12.0oz), 4.6cups (37.2oz). Made out of borosilicate glass means you can use them in the oven (the lid is not oven safe), in the microwave (without lid to prevent pressure buildup due to the heat), in the freezer and they wont break. Heat them up to 750F with confidence. Borosilicate glass is stylish and you can also use the containers to Prep, bake, serve & store, all in the same container Glass Containers are odor and stain proof so you can heat up or cook any type of food and it wont leave any residue behind, even greasy or oily foods. Our patented airtight lock down lid and hollow silicone seal system prevents any leakage so you can carry liquids with absolute confidence anywhere you want to go. Take soup, gravy, dressing, or whatever you want, wherever you go. Over 1 million sold online.