1.Glass Food Storage Containers With Lids Airtight: The glass snapware containers with lids include 10 pieces. 5 containers of clear 4.5mm thick borosilicate glass. And 5 transparent polypropylene lids with blue silicone ring/trim. Our containers set come in different shapes, meeting all your needs! 2.Easy To Close: Our Pyrex glass storage containers with lids are easy to open and close, operate by 4 snap/locks; the covers are polypropylene combined with a silicone ring for a substantial leak proof, air-tight, and water-tight seal function. Great for lunch containers and food storage. 3.Multi Usable: These airtight food freshlook storage containers are oven- up to 400℃, microwave-, and zer containers secure (the lids are not oven or microwave-), making them ideal for cooking and suitable for long-term food storage. 4.Diverse Applicability: Our kitchen storage containers have various uses. You can place the container in a micro oven to heat the food or place the glass containers with lids in a zer to keep the food fresh for a long! Food containers with multiple applications.