Patent ID: 8444339

Claim:
An apparatus, comprising: a body extending longitudinally between a top end and a bottom end, wherein the body includes an elongate slot that is longitudinally disposed in an outer surface of the body, the slot having a first detent and a second detent, the second detent being spaced apart from the first detent; an open-ended cap disposed coaxially around the body and configured to slide along the body, wherein the cap has a cut therein that defines an elongate arm having a first end and a second end, wherein the first end of the arm is connected to the cap, and wherein the second end of the arm is not connected to the cap and is able to flex away from the cap, wherein the elongate arm has a protrusion at the second end that projects radially inward and is sized to engage the first and second detents, the elongate arm further including a depression on its outer surface at the second end proximate to the protrusion, wherein the protrusion is slidable within the slot until the protrusion detachably engages the second detent which retains the cap in a closed position in which the cap covers the bottom end of the body, and wherein the protrusion is further slidable within the slot until the protrusion detachably engages the first detent which retains the cap in an open position in which the bottom end of the body is exposed; and a clip having an inwardly-oriented protrusion that engages the depression on the elongate arm and thereby inwardly biases the second end of the arm, wherein when the cap is in transition between the open and closed positions, the second end of the arm and the clip together flex outward, away from the body of the apparatus.