I'd be happy to send you the stl but I just discovered that when I sized the tube and lid I was using a stick that that had worn down from use. Consequently a new full size stick won't allow the cap to go on. I wish I'd used parametric parameters in the design so that it would be easy to change but alas, I didn't. Also in a reply below "luvmysuper" asked if I thought all the open space would dry the soap out too much. That was not something I thought about but may be a real issue.^that's clever, useful too. Is thare a place where I can get the .stl file?