most often, different amounts are poured from one bottle for different priced drinks. For instance, what should the retail value of a bottle of gin be if a gin fizz of 1 1/2 ounces sells for $4.50, a specialty martini with 2 ounces of gin sells for$6.75, and a Tom Collin using 1 1/2 ounces of gin sells for $4.25? The answer will depend on how many of each are sold from the bottle, and the one drink one-price method will not work.