Silicone Storage PouchIf you are looking for a safe and environmentally friendly alternative to store your breastmilk or baby food, this one's for you! The Smoobie silicone storage pouch can be reused over and over again, reducing the impact that single use plastic makes on our environment. Multiple uses It is compatible with most breast pumps. The standard bottle neck of 35 mm 1. 38 inch matches most of compatible breast pump head and baby bottle pacifier in the market.