ICUP Stonerware - Marijuana Leaf Molded Green Rubber Ice Cube Tray Official Stonerware Ice Cube Trays & Stonerware Merchandise. Stonerware Ice Cube Tray Marijuana Leaf. This Stonerware Ice Cube Tray produces marijuana leaf shaped Ice Cubes, is made from heavy rubber and is dishwasher safe. Stonerware Ice Cube Trays make a great gift for any Stonerware fan. Enjoy!!