I needed a soap dish and nothing was jumping out at me on online. I whipped this one up that holds a bar of soap and a razor. I designed it so the suction cups wouldn't be visible and it's really sturdy.
Suction cups were like these - http://amzn.to/2EBHFWo
I included a .step file so you can remix if you want. I'd love to see what you come up with!
The author hasn't provided the model origin yet.