I just moved into a new apartment and needed a bar soap holder that uses double-sided tape because the suction cup ones kept falling down. Naturally I went looking on Thingiverse and couldn't find one I liked. So I made my own!
If you decide to print one out, snap a pic and post it under the "Made" section! Failed prints are also accepted!
The file was made in SolidWorks and I can send it to you on request.