Patent ID: 7267247

Claim:
A portable beverage dispensing system comprising: (a) a supply of flat water: (b) a supply of pressurized gaseous carbon dioxide; (c) a first motorless carbonator configured to receive a portion of the flat water and a portion of the carbon dioxide and to cause a portion of the carbon dioxide to dissolve in the flat water to produce partially carbonated soda; (d) a second motorless carbonator configured to receive a portion of the partially carbonated soda and a portion of the carbon dioxide and to cause a portion of the carbon dioxide to dissolve in the partially carbonated soda and to produce fully carbonated soda; (e) a dispenser for selectively dispensing the fully carbonated soda; and (f) a flavored syrup supply and at least one pneumatic pump powered by the pressurized carbon dioxide, the pump being configured to cause flavored syrup to pass from the syrup supply to the dispenser, and wherein the dispenser mixes syrup with the fully carbonated soda in a desired proportion.