Add-a-Twist is a strong and impact resistant backpack organiser that allows users to organise and keep gear separate, dry, safe and easy to find inside a backpack. It provides quick storage and access options and, thanks to its double-sealed lid, is waterproof and airtight. The Add-a-Twist is easy to pack, hang and carry, furthermore it floats and is easy to clean. The bayonet lock allows for a firm grip and quick access. Mea-suring lines indicate the filling level.