100% NON PLASTIC FOOD STORAGE CONTAINERS These borosilicate glass freezer containers for food storage and glass refrigerator storage containers with glass lids are a safer, nontoxic, healthier alternative to plastic food storage containers. VENTED GLASS LID FOR MICROWAVE REHEATING Reheat leftovers or steam food directly in microwaveable glass bowls with lids. Splatter-free, vented glass lid with silicone seal releases steam and locks in moisture, evenly reheating food with no cold spots. MICROWAVE, OVEN, FREEZER & DISHWASHER-SAFE Use these non plastic microwave containers to store, bake, & reheat. Oven-safe (500 F: bowls, 400 F: lids). Freezer safe glass food storage containers go from microwave to oven to table to dishwasher.