3D Printed E-cigarette Part That allows For Refills

I usually post in this folder a lot of useless, but cool 3D prints. Well I found this 3D print, one of the coolest yet if you like saving money. The designer, a member of Thingiverse smokes e-cigarettes, the kind in which you purchase disposable cartridges for. He was tired of having to buy a whole new cartridge every time he ran out of liquid in his, so he learned how to take the cartridge apart and fill it with cheap e-cig liquid. The problem he had was that once the end of the cartridge was removed it could not go back on.

This is where 3d printing came into play. He modeled and then 3D printed a very small end piece that fits snugly on the cartridge. This can save him close to $50 a month on refills if my calculations are correct.

http://thingiverse-production.s3.ama...w_featured.jpg

check out his video below:
http://youtu.be/ZawlOPkEdSQ

Too bad he didn't put a link to the stl file.

OME

Now comes the money he will charge for the .stl file after all the hits he will generate from the video. :D