MULTI SCENARIO USE: -40/-40 in freezer to 400/752 in oven, safe for oven, microwave, dishwasher and freezer.The lids are not oven or microwave safe,please remove the lids before heating and cooking food.It's safe to wash the lids in the 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 STACK AND ORGANIZE: These Square Glass food Storage Containers are a great way to keep your fridge, pantries or shelves neat and organized. Containers can nest and stack for convenient and compact storage. Removable sealing rubber ring makes it easier to clean BPA FREE: These Small Square Glass Storage Containers are non-porous glass that is BPA Free for easy heating and durability. BPA free lids are specially designed to snap down completely making them air-proof which will maintain freshness SIZE: This Square Glass Food Containers With Lids L*W 5.2in,H 2.5in,2-cup