From the product description, check product page for current description, price and availability:

• Ukeg – keep beer fresh for weeks.
• Carbonation cap – automatically regulates pressure to optimally carbonate beer. Choose desired carbonation level, from zero (off) up to 15 psi.
• Vessel – durable, double-wall Vacuum-insulated stainless steel.
• Pressure gauge – easily read the pressure inside the growler.
• Dispenser tap – easily pours beer any time, without removing cap. Plus taplock to prevent dispensing.
• Interchangeable tap handle – handle can be changed to personalize or represent your favorite Brewery.
• Sight glass – shows contents of uKeg and how much is left.
• Co2 cartridge – uses low cost, food-grade Co2 cartridges.