For some of us, showers are sufficient, but if you want a more spa-like experience, or at least a full bathtub, space can be a serious factor in urban settings.

Designer Dominik Chojnacki has a vision for a fold-up tub that provides the amenities you want but that takes up the same space as a shower.

Potential problems of this prototype, though, are clear: drainage when you tilt it up, robustness of the mechanism and of course … why doesn’t it double as a stand-up shower when not being used as a tub? Still, a neat concept nonetheless.