Don't let fridge and food smells reach the milk you worked hard to express. MOCHi's storage bags use a two-layer design — the outer layer blocks odours from the fridge or freezer, while the inner layer keeps your milk tasting fresh for as long as possible. The DuoSafe double-zip seal is fully leakproof and keeps air out, helping protect the milk's nutritional value until you need it. BPA-free and simple to fill, seal and store flat or upright.