Light weight travel growler. 64 oz. Food grade stainless steel. Uses Craft Master C02 regulator cap with PSI gauge, regulator, safety valve and zipper tab pressure release. Includes 2 x 8 gram C02 cartridges and 8 gram cartridge hold (can use 16 gram cartridge holder if bought as an accessory). Also, includes standard air tight cap, and powdery brewer wash packet. Fits all Craft Master caps, such as Ball Lock cap. Dispensing system is standard Ball Lock system with picnic tap for ease of cleaning, maintenance or customization.