When on a long flight, in a light aircraft, and the urge is strong, but a place land is not available (especially flying over water!), the TravelJohn can save the day, keeping minds clear, pressures down and avoiding 'smelly sloshing bottles' waiting to spill at the next bout of turbulence. This makes for a happy crew and a clean cockpit! Likewise, on a long drive in remote parts or at an aviation show set-up prior to the 'facilities' being opened, the TravelJohn absorbs the liquid, the odour and the potential embarrassment of crew who 'need to go now'.