The SNAP Glass Food Storage Containers are made of naturally BPA-free borosilicate glass, enabling them to withstand extreme temperature changes without the risk of cracking or shattering. The SNAP lids ensure a leakproof seal, and an elegant design means it can move seamlessly between the oven and the table. Dimensions: 4.5″ x 4.5″ 2.5″. Capacity: 1 Cup.