PREMIUM BOROSILICATE GLASS:Our glass storage containers are made from high quality borosilicate glass, which is stronger than cheaper glass food storage containers, safely go straight from the refrigerator to the microwave or oven to the table. 5 PACKS GLASS MEAL PREP CONTAINERS: With 5 packs 36oz single compartment food prep containers with Lids, They are great for meal prepping. Save time by cooking and freezing your meals for later. AIRTIGHT SMART-LOCKING LIDS: MCIRCO Glass food storage containers use snap lock lids that comes with silicone seals to ensure your meal prep food will last much longer than normal plastic food storage containers. These lids are easy to use and will stop leaking. These lids will not break or slowly stop working. USER FRIENDLY: Easy to use and easy to take care of, as the glass containers can be used in the microwave, freezer, dishwasher, and oven. But the plastic lid can not be placed in the microwave and oven. SPACE-SAVING: The food storage containers have stackable design, can keep refrigerator, home and kitchen organized, and leave more space on your kitchen slabs and cabinets.