Bubi Hatch Insulator band for the bubi bottle, Made from Neoprene and velco to wrap around your bubi and keep items hot and/or cold. The 22 oz has a strap and pocket for keys or cards while running or hiking The special strap keeps the bubi hatch secure on the bottle. fits around the carabiner The bottle is still flexible and rolls up or goes flat when empty The bubi hatch is a great compliment to the bubi bottle.