Olympia Kristallon Polycarbonate Tumbler Green - 260ml 9oz (Box 12)Made by Olympia Kristallon, these green polycarbonate tumblers are bright and colourful, chip resistant and virtually unbreakable, making them perfect for regular use in schools, hospitals, outdoor activity centres and other institutions where shatterproof crockery is essential. The veins and ribs that surround the cups allow them to be stacked without causing a vacuum, so they can easily be pulled apart.