At the 1970 World Expo in Osaka, Sanyo demonstrated their vision for the future by showcasing some of the appliances they thought would make it into the home of the future. One such device was this crazy Ultrasonic Bath, a pod-like womb-thing designed to clean, massage and dry humans in just 15-minutes.
The user would climb into an opening on top via a ladder. Then just set the temperature desired water temperature and the pre-rinse cycle starts, spraying the user with jets of hot water for 5 minutes. Crazy. Might as well put some clothes in there with you. Check out a video below.