Small cup with an screweable cap (in Sketchup)

This is my attempt creating a small cup with an screweable cap in Sketchup using some plugins:
-screw 1.5
-roundborders
-dxf/stl export
-solid inspector

Print instructions

Here is all the process in Sketchup: http://www.youtube.com/watch?v=C7nH4ou4Qr0

Cap is very, very tight!