The Drinking Buddy wine bottle topper and wine glass marker set by Umbra is constructed of flexible, food-safe rubber. The stopper keeps open bottles of wine fresher, and the assorted color charms slip easily onto any standard stemware glass and help identify each person’s drink in a crowd. Fun conversation starter and great host/hostess gift! Topper measures 3-1/2 inches by 2 inches by 1 inch. Each glass marker measures 1-1/4 inches by 3/4 inch by 3/4 inch. Hand wash. Designed by Alan Wisniewski for Umbra - original, modern, casual, functional and affordable design for the home.