So this is a little bit more complex than building a boat out of popsicle sticks, but after all, it’s going to eventually be sailed over 11,000 miles on the open ocean.

According to CNN, the ambitious eco-adventurer De Rothschild is currently in the process of collecting and constructing a boat made almost entirely out of plastic PET bottles. In April, Rothschild plans to sail his boat, called the Plastiki, from San Francisco to Sydney.