Embodiments include combination coaster drink covers which serve as an ordinary bar coaster and absorb moisture from the outside of a drink glass, protect the bar surface from moisture, and furthermore serve to cover and adhere to the top of the drink glass, thereby indicating the intention of the drink owner to resume possession and preventing adulteration of or tampering with the drink during the owner's temporary absence. Embodiments include an upper coaster layer, adhesive layer, release layer, and lower coaster layer. Other embodiments include an upper coaster layer, adhesive layer and release layer.