Adjustable cap for a container

A cap for a container, comprising:

• a cover member having an outlet;
• a base member engageable with the container, the base member having an inlet comprises a plurality of third openings;
• an adjusting member co-axially connected with and rotatably movable relative to the cover member and the base member;
• the adjusting member having a plurality of second openings adapted to cooperate with the inlet to define a fluid flow passageway connecting the inlet of the base member to the outlet of the cover member;
• wherein the adjusting member is actuatable at an exterior of the cap, such that actuation of the adjusting member causes the plurality of second openings to rotate relative to the inlet;
• the plurality of second openings of the adjusting member and the plurality of third openings of the base member are arranged such that rotational adjustments of a position of the adjusting member relative to a fixed position of the base member causes said plurality of second openings to move into and out of alignment with the plurality of third openings to thereby vary the size of the fluid flow passageway.