This Wide Neck Keg is: UN-certified (1H2) and produced using 50–70% post-consumer and post-industrial recycled HDPE Air and watertight through the use of a rubber gasket (included) Stable stacking through a clever base and lid construction Super strong and robust design. Tamper evident by using a compact seal (not included) Perfect for protecting your valuables whilst on water in canoes or boats. Keep your keys / phone / camera in here and have assurance that should it be knocked overboard, if you can retrieve it in a timely fashion your possessions will be unharmed.