Magnetic Closure: Always know which glass is yours! Decorate any glass with Vino's Magnetic Closure Wine Glass Charms. These drink charms are made with three strands of elegant beads and have an innovative magnetic closure. Use on any stemmed glassware including wine, martini, margarita, and champagne glasses, or a handle of a coffee mug. The magnet also works through glass so you can mark any stem less glassware.