I have a Grohe faucet, and a Lacava sink. The sink requires a larger 2" (European) drain, so I didn't get a Grohe drain. I got one from Lacava.

The sink has a small name on it, the faucet has a small name on it but the click-clack drain doesn't. Good thing, as I don't like all these prominent names on every piece of hardware I buy.

They make those click-clack drains in normal size too. You push on it to close it, and push again to open it. At first I balked at putting my hands in the water to open the drain, but then, come to think of it, if I'm washing delicates, or my hair my hands are already IN the water. No big deal.

-Babka