Wean Green's Lunch Bowls tempered glass containers are perfect for lunch on the run, pack an entire lunch for everyone in the family! The leak proof silicone seals ensure no spills in your diaper bag or lunch bag. The seals are removable to ensure no bacteria build up. Lids are durable and have passed the 'use' testing machine over 3 million times per tab! The child friendly design allows easy opening for small hands and the glass is 4-5 times stronger than a drinking glass! Wean Green Lunch Bowls are freezer, microwave, & dishwasher safe.