Keep these steel ice sticks in the freezer ready for use and then place one in your glass to chill your drink rapidly. The gel inside stays cold enough for several refills of your glass without dilution you would get from regular ice cubes. The hooked handle hangs on the edge of the glass and is to carry. Just rinse, replace in the tray and recharge in the freezer.Ideal for wine glasses and tumblers. Handwash recommended.