18 PIECES GLASS FOOD STORAGE CONTAINERS WITH LOCKING LIDS 1.Microwave safe 2.Freezer safe 3.Oven safe 4.Dishwasher safe Borosilicate glass can also handle immediate temperature changes of up to 120℃ /248℉. Our borosilicate food containers,baking dishes,mixing bowls and casseroles are safe for use in the oven,microwave ,dishwasher and freezer.lead-free, non-toxic, non-porous (won’t absorb food odors, flavors or stains), and BPA free. From microwave to freezer to oven ,containers safely go from one extreme temperature to another