The Platstiki set sale yesterday for a month long journey on the Pacific ocean...the boat was constructed using 12,000 plastic 2-liter bottles, which have been pressurized using dry ice powder, making it buoyant enough to carry four people on the 11,000 miles from San Francisco to Sydney. It'll take 100 days they think, with the electricity coming from solar panels, wind turbines and exercise bikes that the four crewmembers will be using.