Balloon Plug is a bottle stopper with an air pocket positioned on each side of a disc. When the valve is opened, the air can be pushed from one side to the other, inflating the balloon on that side. To seal a bottle, the disc is placed over the rim and the top balloon is squeezed. The enlarged lower balloon assumes the shape of the bottle’s throat, sealing the opening when the valve is closed. Removing the seal simply requires the opening of the valve.

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