This hanger was requested by a friend who is very environmentally conscious. I thought this was a great way to recycle 2 bottles while utilizing the TOM's capabilities! A design similar to this by Chinese designer Xuan Yu inspired this thing's creation. One thing to note is that the holes to accept the threads to the bottles are not threaded. A compression fit seems to work well enough.This thing is part of a final project for CPSC 183 Technology and the Law with Prof. Brad Rosen at Yale University. The idea of this project is to ask friends for ideas for physical objects that they would like to have that could be printed on the Makerbot TOM. I have designed them, printed them out and given them to the people who requested them. I also have uploaded them here to Thingiverse to add to the library of physical objects that people find cool, useful, or just plain fun!Print and clean. I needed to use a Dremel tool to cut the threads off of the bottles I was using and a compression fit worked great! Just make sure the fit isn't too tight or else you might crack the part depending on how it was printed. A dab of superglue on each side and this hanger is all ready.If you would rather try to screw your bottles in, I would scale it up a few percent (3-5). Don't scale too much though or you won't anything to grab the inner surface. Of course, unless you would rather just push the bottle top right into the socket.