There are tablets and phones coming out as well that can take 3d pictures like the new Intel Realsense technology. Soon you will be able to get a fairly high quality 3d model just by scanning the object with a phone/tablet and then importing into your favorite 3d modeling program. With just a few minutes of cleanup to remove any artifacts you will have something you can print out in glass! Imagine taking your favorite percs from your pieces and combining them in any order you want. I can only speculate that in just a few years you can do all of this from a phone and there will be apps that make it as easy to make a "copy" of a piece as it is to make a copy of a DVD now. EDIT: It would be even more awesome if 3d percs were shared on shapeways so people here could create and customize their own bongs.