Bottle Cutter
thingiverse
just print it out and super glue a razor blade in to the small slit. the long slt holds the bottle flat as it it cutting to make a smooth strait cut.
Download Model from thingiverse
With this file you will be able to print Bottle Cutter 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 Bottle Cutter.