I filled a 3.17L "presentation bottle" for my latest batch of sour cherry ale. Somehow I assumed the rim had the same diameter rim as my other bottles. After priming and bottling, I put a bottle stopper on it (one with a handle that you pull to the side to form a seal). Does anyone know how strong these things are, generally? Or is there anything I could get online quickly enough to make a reliable seal before the corn sugar has been consumed? I don't have corking equipment or even know what kind of equipment it is. Thanks everyone