Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2065359.

This is a just a simple cup that I designed to hold my wife's unicorn makeup brushes. I took my other design,

(nail file holder http://www.thingiverse.com/thing:1760758, shorter / wider of the nail file: http://www.thingiverse.com/thing:2121914)

and made it a bit wider and taller. This allows a very stable base that will only tip over if you really try. Even empty, the holder has a bit of weight to it.

The holder is 80 mm wide at the base and 100 mm tall.