Thermos 3 Piece Boxed Reusable Ice Mats Thermos 3 piece boxed reusable ice mats includes two 12 cube mats and one 36 cube Mat The cube Mat is food safe, reusable and durable Each cube contains clear, Non-staining purified water Silver reflective backing provides an Extra layer of insulation to increase cold retention Store in your freezer until ready to use: Mat remains flexible when frozen