These containers are oven safe over to 700℉, you can use them for freezer storage, microwave(not the lids), and dishwasher. Easy to use and easy to clean. 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.[SMART SNAP LOCKING LIDS]The glass food containers with snap-locking lids are airtight, with no spill that ensures your food will last much fresher than normal plastic containers. The snap-locking system forms an airtight and watertight seal, never food spilling over again. And in order to prevent the rubber seal from sticking to the glass containers, please must wash the lids and glass containers before putting them away.[MEET YOUR NEEDS] These glass containers will be a good helper for serving your everyday food storage needs, not only are these good for dry foods but also our glass containers are great for holding liquids such as juice, Soup, and more. you can use them over and over again, save your money, and your time, it's easy. Divide and conquer for meal prep perfection Durable high-quality tempered pure glass easily nests and stacks with other storage secure, airtight latching lids for taking food on-the-go Containers resist stains and do not absorb food odors or flavors Containers are dishwasher, freezer and microwave-safe BPA-free plastic lids are top-rack dishwashers, freezer, and microwave safe.