"With an air filter that eliminates odors and soft lighting that gets rid of the need to flip the switch in the middle of the night, shocking your sleepy eyes....Japanese toilet engineers have unveiled a model that tells you your body-fat ratio and plays digital recordings of chirping birds to mask embarrassing sounds"
If that bit has not turned you off, read more at Popular Science.
And more at Wired about NASA's $ 19 million toilet system
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