Tube container caps

Hello,
like a lot of tinkerers, I'm often looking for small tight boxes to store things such as small bolts/nuts, electronic components...or to preserve matches from damp.
The most cost effective method I've found till now is to buy 2.5 meters long PVC tubes (retail price : 1€ !), cut them at the proper length and glue them with 3D printed end caps and screwable caps.
The version shared here is designed for 20mm tubes (external diameter : 20mm, wall thickness :1.5mm => internal diameter 17mm). If I'm not too lazy, I'll try to share another version designed for 25mm or 32mm tubes.

this is my first small contribution to the Thingiverse community, hoping that you'll find it usefull !

IMPORTANT WARNING :
Please note that the file named : "BouchVisTub20mm v2.stl" has to be resized (reduced) at min 98% of its original size during the slicing (I use Cura). This will make the screw loose enought to fit properly in the cap !