Toilet Bike
There’s someone taking Earth Day seriously – offset carbon while not polluting the groundwater. Presumably, the waste is biodegraded and then spread on a Peapatch somewhere. Or, as placenamehere said,
plenty of storage for groceries!
Don’t know where this Porta-Potty was spotted, but it joins the Crazy Bike Inventions collection. Also see the Lawn Mower Bike.