Il Bere Wine and Drink Charms Holiday Collection, Happy 40th Birthday Set of 4-happy 40th birthday magnetic wine and drink charms; a unique way to "mark your drink; works with any glass Features extra strong coated rare earth magnet, tin plated steel, recycled paper, mylar coating; packaging can be used for charm storage Magnets are safe, won't come apart unless the outside charm is removed; won't affect the taste of the beverage To use: drop magnet in glass, hold charm to outside of glass or base until two magnets attract, slide to desired position, pour beverage Wipe clean with damp cloth; do not soak in water; made and assembled in USA