Patent ID: 8678183

Claim:
A contained system for dispensing additives comprising: a container for retaining a base liquid having a threaded neck opening; a retaining element in peripheral contact with the threaded neck opening and having an additive dispensing hole; an additive bladder in contact with the retaining element, including a portion of an additive enclosed by the additive bladder, wherein the retaining element seals an enclosed cavity containing the additive bladder with respect to an interior surface of the cap and a surface of the threaded neck opening; a convex element for pressing the additive bladder against the retaining element; and a cap for sealing the container enclosing the retaining element and the additive bladder including: threads that rotatingly mate with the threaded neck opening; a first circumferential cap fixture for mechanically securing the retaining element before dispensing of the additive; and a second circumferential cap fixture for mechanically securing at least a portion of the retaining element after dispensing of the additive; wherein the cap is configured to: upon rotation in a first angular direction, press the additive bladder against the retaining element in a closure direction, wherein the convex element presses against the additive bladder and the additive is released through the retaining element into the base liquid; and upon subsequent rotation in a second angular direction opposite the first angular direction, release from the threaded neck opening in an opening direction opposite the closure direction, wherein the retaining element and the additive bladder are retained in the cap.