Hah, you'd probably go blind if you washed your face in a urinal anyway.

assuming you didn't go blind by washing your face in a urinal, it is, at least, a temporary thing...

A urinal implies "public washroom", where-as a toilet could but public or private. For this reason, I'll go with drinking for the toilet.

On the other hand, if both are forced to be "public" then I'd go with washing my face since I'm not ingesting anything.