[OVEN, MICROWAVE(Not the lids), DISHWASHER SAFE /FREEZER SAFE] Our glass storage containers are made from high quality borosilicate glass, which are oven safe over to 700°F, you can use them for freezer storage,microwave(not the lids)and dishwasher. [BPA FREE/ LEAD FREE] The containers are made of borosilicate glass(Lead-Free) and plastic lids( ECO-Friendly, BPA-Free ) are air-tight and leak-proof to make sure there are no spills. [STACKABLE/ EASY CARE ]These glass containers are made to nest inside each other and save crucial space when not in use. It's safe to wash the lids in the Top floor of dishwasher, but high temperatures over a long period of time can deform the silicone sealing strip at the edge of the lid. Please wash the lids by hand as much as possible. Simply prepare your favorite meals once and storage your meals individually at home.Save your time and relieve your stress of cooking different dinner every night and easily control your daily intake when dieting.