Mama Substitute Milk Bottle Set - Set of 2 - Bundle Sale - No Individual Sales - No Price Negotiation Used a few times over the course of a few months. There is a zipper, but it doesn't seem like you can remove the inner cushion and wash only the cover. There is a little milk stain in the fifth photo. Please check the photos and refrain from purchasing if you are concerned. ⚠︎ The white parts are sticky, but that's how they are originally. (It seems to be sticky so that the baby bottles don't slip.)