These Michigan Shape Ice Cube Trays are made of food grade low density polyethylene. The Michigan Ice Cube Tray can withstand temperatures up to 255 degrees. Each ice cube tray makes 8 large Michigan ice cubes or molds that are 1 1/4″ thick – 16 ice cubes or molds total. The Michigan Ice Cube Trays are available in White or Great Lakes Blue. Each package contains 2 trays.