Erosion sink

What happens when water erodes a softer, more porous material?
Gore Design Co. have evidently been studying this intently,
as their eye-catching concrete Erosion sinks demonstrate...
there is an ecological message at work: “you do not need to use so much water”.

I know. How could you wash your face on a sink that shallow? It looks cool though. I wouldn't mind having one in my house.

See more cool designs at the Web Urbanist.