The TapIt Cap ($45) is your beer growlers best friend. If you love to buy your craft beers in 64 oz growlers, but hate it when the beer goes flat if you don’t drink it in a day, then you’ll love the TapIt Cap. The kit consists of a cap that screws on to the growler, a CO2 cartridge and a CO2 dispenser. It’ll keep your beer fresh and drinkable days longer than it normally would be. Preorders are available now, with deliver expected in November.