The original Jizz and Not A Jizz Towel!
Name a more iconic duo, I'll wait. Featured here, the original Bad Grandma Designs Jizz and Not A Jizz Towel dishtowels. Sometimes it's useful to, uh, not be subtle.
(And or those of you with "Across the Pond" sensibilities, we also have the Wank and Not A Wank towels, here)