Review on Wine Bottle Protector Bags 18 Pack with Air Pump: Leakproof Glass Travel Sleeves for Safe Transport, Complete with Air Filled Column Cushioning and a Wine Opener by Karl Swift

They are the best protectors. They fit in a standard 750ml bottle or in a single bottle carton. Comes with a small hand pump, they are flat like an envelope when you put the bottle in before you pump them up. The top inflates with the rest and folds to protect the top. I use 2 rubber bands to keep it closed. I could use tape but it would be less reusable that way. After pumping, I didn't understand if it could be straightened again. When I say refillable I mean take out one bottle and put another in for storage etc. Very easy to use. I collect and ship bottles everywhere and they fit 2 side by side (inflated) in an average USPS flat rate box. I take it (flat) and the pump with me in the case, so if I want to ship wine or bottles home I can easily do that without having to hunt for packaging. Definitely worth the price and I will buy more.