Combo sink/toilet systems such as this have been prevalent in Japan for years, but Roca’s W + W (washbasin + watercloset) looks much more practical and introduces some fresh features.

But with the sink facing out from the toilet seat, it has a more separated look and, I would imagine, feel. In fact, it wouldn't feel odd to use the Roca basin for, saying, tooth-brushing.

The space-saving designs include placing a vanity sink on top of the powder-room toilet's tank. (Trust me, it's cuter than it sounds; click through the photo gallery above to see it).

Milan designers Gabriele and Oscar Buratti have collaborated with bathroom brand Roca to create a combined toilet and wash basin, where waste water from the sink is used to fill the toilet cistern ...

We've rated and ranked bathroom fixtures from big-name bathroom companies, including B&Q, Ideal Standard, Ikea, RAK, Roca and more, based on feedback from more than 6,800 people. The tables show how ...