QR Code Cover
thingiverse
It's a cap for your QR code that resembles a marijuana leaf. I'm pretty sure you can figure out what to do with it. If not, put down the bong and take another look at the backing option to change the leaf's color. The design should fit now that it's been scaled to 98% of its original size.
Download Model from thingiverse
With this file you will be able to print QR Code Cover with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on QR Code Cover.