Abstract: A drinking straw has an outer straw member having a lower portion, an upper portion having a top, and a mixing element, the mixing element having radially expandable and retractable vane members defined by two longitudinal slits, an upper hinge attached to the upper portion and a lower hinge attached to the lower portion and an inner straw member located internal to said outer straw member, the inner straw member having a bottom and a top, wherein the lower portion of the outer straw member is attached to the inner straw member, the outer straw member movable between a retracted position and a deployed position where stop portions of both straw members engage with each other so that the mixing element vane members radially extend away from the inner straw member and wherein the vane members retract when the outer straw member is in its retracted position.