These two friends made a boat made from 50,000 plastic bottles

Jakub Bures and Honza Kara, the masterminds behind the bottle boat

Attaching the bottles together was no easy feat. They were also filled with dry ice to increase buoyancy.

It took more than 50,000 empty bottles to create their craft.

A nice sturdy frame to hold the whole thing together.

Without a rudder, you've got no direction.

The main propulsion of the boat will come from old bike frames attached to paddles.

If it looks elaborate, it's because it needs to be. They plan to sail the plastic bottle boat down the Elbe River from Nymburk in the Czech Republic, to the city of Hamburg, Germany.

I guess that kind of looks like a boat...

It actually floats!

It looks pretty good from up here!

Even the cabin is made of plastic bottles.

I guess when he's done drinking, that could be a valuable replacement part.

In total they plan to travel 530 miles all told.

The rudder system seems to be working perfectly.

They expect the journey to take at least a month if not longer.

They will be travelling from Prague to Hamburg. It looks co close on the map!