Shelter capsules to relax

I'm in Barcelona (for this) where I just discovered this Flotarium concept: a spaceship-looking sensory deprivation capsule full of water and salts to create optimal buoyancy so that people can float and relax.

The design is impressive. And few minutes after discovering this, I ran across this amazing napmosphere (via): a modular system meant to be like a cocoon - providing a place of shelter.

This seems to be an intriguing trend.