I came across a question recently which was whether anyone knew of a way to have a walk-in bath and how that might work.
Today’s invention is one possible solution, which takes no account of the costs involved.
A large tank in the shape of a trough is bent around in a circle and rotated about a central horizontal axis. This axis acts as a conduit for water which is fed into the trough. it is held there as a layer by centripetal acceleration.
A bather can climb up a ladder and walk out on a gantry into the flowing water. This can be arranged so that the drag of the water exactly equals his weight and thus a bath can be taken in an upwardly moving stream.