I got this in a Metrokane kit, and loved it about three times. It fit into the bottle, seemingly over any bottle top and made a tight seal. Though on my fourth bottle, the twist top broke away from the rubber plug making this product useless. I wasn't extremely tough on this piece and was using finesse. I drink a lot of champagne and wine and love other products that I've bought to open, seal, preserve wine. Although, this is not one of the items I would suggest to anyone.