Patent ID: 8672185

Claim:
A multi-chamber cap for selectively mixing and dispensing a plurality of flowable substances, comprising: a main piston for receiving a primary flowable substance from a primary reservoir; a mixing chamber for receiving a quantity of the primary flowable substance and a quantity of the secondary flowable substance; a plurality of secondary reservoirs for storing a plurality of secondary flowable substances; a plurality of booster pistons, each of the plurality of booster pistons being associated with a respective one of the plurality of secondary reservoirs, each of the plurality of booster pistons for dispensing the secondary flowable substance contained in the respective one of the plurality of secondary reservoirs; and a selector for selecting one of the plurality of booster pistons to be actuated upon actuation of the main piston; wherein actuation of the main piston causes a first quantity of the primary flowable substance to be introduced into the mixing chamber, and simultaneously causes a second quantity of a secondary flowable substance from a selected secondary reservoir to be introduced into the mixing chamber where the primary and secondary flowable substances are at least partially mixed, and wherein the selector comprises a rotatable ring having an activation flange and at least one guide arm positioned for contact with the main piston, the activation flange further being positionable adjacent one of the plurality of booster pistons such that when the main piston is actuated, the at least one guide arm engages the main piston causing the activation flange to actuate the selected booster piston.