Bike bottle anti-dust cap (for M-WAVE bottle + FreeCAD source and STEP for customization)

Actually, this M-WAVE bottle had a cap but it fell out somewhere on the road. So I couldn't take the measurements of the original cap, and this 3D-cap is not a 100% copy of the original, but it works fine. 

Requires some after-printing handwork with an engraver/dremel to find the best grip force of the nipple holding pins (initially it was too strong and difficult to open, at least in my print).

Requires support under the holding pins only:

Printed with PETG (it is strong and flexible enough for the connector to work properly). 

Optionally: after printing, hold the connector line 15-20 cm above a gas lighter until it gets hot and starts to bend under the weight of the cap, and shape it with your fingers to kind of semi-circular shape. Although it bends well even when it is straight, this shaping will press the cap down better to reduce the amount of the dust that can get inside through the gap between the cap and the bottle.

PS: If you want to use it with different bottles, you will have to modify the holding pins, because this M-WAVE bottle has a non-standard low-height nipple. Use the FREECAD source file to modify the nipple holding pins to the required height and diameter.

PS2: I've bought a couple of new bottles but they all have horrible plastic smell, even though they are promised to be food-approved HDPE. So I decided to give this old and dirty M-WAVE bottle a second life because it doesn't smell, at least until I find a new bottle from a reliable plastic :)