Abstract: A device and method of use with a vessel, e.g., glass or bottle, holding a drink to indicate that the person to whom the drink belongs has not abandoned it and/or his/her seat and/or to protect the drink. The device is a thin member that is generally planar or arranged to be generally planar and is arranged to be disposed on and supported by at least portions of the rim of the vessel to cover the drink. The device has an opening extending through it adapted to enable an item associated with the drink, e.g., a toothpick with an olive on it, a straw, etc., to be extended through the opening into the vessel. The planar member bears indicia indicating usage of the drink/seat to be readily visible when it is in place on the vessel.