This is by far the most useful print I’ve ever made.
A lens cap holder. The design is open source online here: http://www.thingiverse.com/thing:9860
The price put on it by some is $20. Of course that’s mostly because it takes so long to calibrate a 3d printer. I can reduce the price if you purchase more than 5.
If you would like to purchase one, please email me.
See pricing options and instructions here
I can spray paint it any color you want. I can also print out one with a peace sign on it: http://www.thingiverse.com/thing:10118
I can adjust the holder to fit any lens cap size and any strap size. There is also an open strap design which allows you to put it on the strap without taking off the strap (see here: http://www.thingiverse.com/image:65841 )
Here are some pictures of the print: