Why don't you give him a circular shower that he powers with his feet?

https://www.instagram.com/p/BzijzsHhr3P/?hl=enhttps://heroichollywood.com/batman-robert-pattinson-batmobile/

You can give him a curtain that's not wide enough, so when he's running to a crime scene in the shower, people are yelling "Batman, I can see your ass," and "Did you fire Robin and replace him with Rubber Ducky?"

Now THAT'S glamour; that's what you call iconic.  He'll be the envy of every other actor in the world.