Pink Tentacle has a description of Sanyo's Ultrasonic Bath pod, showcased in 1970. It looks nice enough, but how good can it be if it doesn't wash your head? If I don't shampoo and scrub behind my ears when I shower, I just don't feel clean. Not to mention you have to climb a ladder to use it.
At the 1970 World Expo in Osaka, consumer electronics maker Sanyo demonstrated their vision for the future by showcasing a series of appliances they thought would populate the home of tomorrow. Included was the Ultrasonic Bath, a pod-like human washing machine that cleans, massages and dries the user in a fully automated 15-minute process.
Using a ladder, the bather climbs in through an opening on top of the machine, which stands about 2 meters (6 ft) tall. Once the desired water temperature is set and the main switch is activated, the pre-rinse cycle starts, spraying the user with jets of hot water for 5 minutes.