Patent ID: 7568673

Claim:
A system for drying a fluid reservoir having opposing flexible walls forming a compartment for containing a liquid, a drinking tube, and a fill port, the system comprising: a suspender and an expander, wherein: the suspender comprises: a first grip structurally coupled to a hanger, the grip oriented to hold the drinking tube and the hanger configured to support a weight of the reservoir; and the expander comprises: a body insertable into the compartment through an opening defined by a collar, the collar defining the fill port of the reservoir, the body having a width and an length; a first surface and an opposing second surface each formed on the body, the first and second surfaces configured to engage the collar, the first and second surfaces being separated by a first distance substantially equal to a diameter of the opening, the first distance being less than the length and greater than the width; a third surface formed on the body, the third surface adjacent and generally perpendicular to the first surface; and a fourth surface formed on the body, the fourth surface adjacent and generally perpendicular to the second surface; wherein the expander is configured such that when the body is inserted into the compartment and oriented such the first and second surfaces engage the collar, the third and fourth surfaces prevent the body from being removed from the compartment unless the body is reoriented.