Having a spare Fizz Infuser is useful for making different kinds of drinks more quickly, or if your original one gets lost or damaged. It's proprietary design allows you to carbonate any drinks using its controlled CO2 pressure release. Foam levels from carbonation can be controlled by Fast or Slow release buttons. The Fizz Infuser allows you to detach/attach the bottle from maker conveniently and safely. The Fizz Infuser is one of the key components of the Drinkmate system. The proprietary Fizz Infuser has unique features which no other carbonation system has, which lets you carbonate any cold drink. Order a spare Fizz Infuser in case yours is lost or damaged, or you want another to make different drinks quickly without rinsing in between.