Other devices aren’t so kind. The Eco-Drop Shower, from Italy’s Tommaso Colia, consists of floor mats with concentric circles that look like ripples in a rain puddle. The circles pulsate to become uncomfortable for a person showering too long. Another prototype, from a Belgian design student, is a see-through bathtub marked like a measuring cup; the levels tell you how much drinking water you’re wasting. A full tub equals 100 bottles. The question is whether the guilt defeats the stress reducing benefits of bathing in the first place.
