Tall threaded tube

I needed a tall tube to put my needle files in, it had to be over 150mm so is really pushing it for most 3D printers, so I decided to make a tube that would push into another tube with a lid.

So you have three pieces - the bottom with a bit that push-fits into the middle, the middle with a thread, and the lid which screws onto that thread, total internal height over about 150mm, but prints at about half that.

I made the hole in bottom/middle cylinders tapered (cones) so there is no sudden 90 degree edge which might have needed supports.

I split the STL into three files to make it easier to print however you like.

Very loosely based on pmoews pill containers and using the [threads](http://dkprojects.net/openscad-threads/) library.