Is this $60 stopper what champagne’s been waiting for?

No sound is more representative of carefree extravagance than the popping of a bottle of champagne. The small-scale explosion of the cork coming out, or perhaps flying across a room, is the ultimate signal of the start of a celebration. It’s a brief rush of luxury, but also the first step down a path of no return. The bottle has been irreversibly opened, and everything in it must be drunk. But despite a centuries-old bottle design that resists resealing, there are times when,...