So, this is a literal “waterbed mattress”!
Seriously, this type of bed is ideally for those with limited physical activities caused by paralysis or any other physical ailment, whether permanent or temporary. But lazy people can take advantage of this, too.
Under the mattress is a bath shower and tub with complete features and a faucet for hot or cold water.
After use, the water is drained through a pump and then funneled through the nearest sink or bath tub.
The shower bed carries an optional Automatic Drain accessory, for easy maintenance and handling.
Via Shower Anywhere