A multivalve with a storage bag and a storage bag configured for temporarily accommodating a liquid gas fuel around a discharge for a liquid gas fuel store formed from a deformable memory material, wherein the storage bag has a temporary, size-reduced position, an outer diameter of the storage bag then being less than 48 mm, and a second, operative position, the storage bag having a sufficient volume. A multivalve with a storage bag includes a storage bag having a bottom with sides rising from the bottom, a one-way valve being placed in or close to the bottom and connected to an inlet in the storage bag, the one-way valve being welded to the plastic of the storage bag.