Beer Saver Bottle Caps
Silicone bottle caps that keep your beer fresh after being opened. Sometimes you crack one open and then realize later that you can't finish it. We know, it's ever so rare, but at least these let you savor your expensive craft beer!
Can also be used by homebrewers to keep bottles sterile in between uses. Also can be used in bars and at parties to safely identify your beer from the rest as well as possibly prevent someone from slipping a roofie into the bottle.