Wean Green's tempered glass Meal Cubes are the perfect size for every eco-chic family member. 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! Snack Cubes are freezer, microwave, & dishwasher safe.Wean Green