The Silicone Milk Storage Bag is the world's first 100% silicone bag and is the perfect solution for storing breast milk! Silicone Milk Storage Bags are a fantastic eco-friendly alternative to disposable plastic milk storage bags. They are made of food-grade silicone and can be reused over and over again, reducing the impact that single-use plastic makes on our environment. Haakaa Milk Silicone Storage Bags are fridge and freezer safe and can be stored laying down or standing up.