"It took thousands of years for the humble toilet to evolve into the model we use today, but there's always room for improvement. With this in mind, Gareth Humphreys and Elliott Whiteley produced the Iota: a folding toilet concept that's smaller and more efficient than the typical loo. The Iota is also far more efficient, using just 2.5 liters (0.6 US gallons) of water per flush, compared to 6 liters (1.6 US gallons) for an average toilet. The designers reckon that Iota could save an impressive 10,000 liters (2,641 US gallons) per person, per year, in typical use. The folding bowl contains a built-in U bend that disengages from the waste pipe when in the seated position. When the flush mechanism is activated by folding the toilet into its upright position, the U bend reengages simultaneously. There's an air-tight seal to ensure that the waste stays right where it needs to be." Source: Gizmag