International Space Station
In space, the bathroom should probably be called the restroom instead, because one really can not take baths there. Instead, astronauts use squirt guns to take a shower. One person squirts himself with a gun while other people stand outside with a water vacuum to get rid of all the water that floats out of the shower. This is quite hard, so astronauts usually just take a "sponge bath" with a wet cloth.Toilets can be another problem. Toilets are supposed to use gravity to work. When one flushes a toilet, gravity makes the water go down. Since the astronauts on the ISS do not feel any gravity, the toilet must be attached to the astronauts and gently suck away all their waste.