14International Space Station
This space toilet is probably something none of us want to experience. Just the thought of going to the toilet in zero-gravity is revolting. Modern technology is a blessing though and this gadget is a real credit to it. The toilet on the International Space Station uses air-flow instead of flushing (of course) and comes fully equipped with thigh straps, foot rests and a harness like something you'd find on a roller coaster.