Abstract: A drinking cup tethering device includes a strap, a first end and a mid-portion of the strap being connected to a releasable two-part connector forming a first loop of the strap. The other end of the strap is connected to a slide connector, another mid-portion of the strap passing through aligned slots through both parts of the slide connector forming a second loop which fits around the cup. A spring between the base and a release button in the base produces a gripping force between the slots in the base and aperture in the bottom to grip the strap which is manually releasable to tighten the second loop securely around the bottle. A rubberized strip on the inward facing side of the second loop helps insure that the cup remains securely tethered.