A mountable Bottle cutter, works with box cutter refill blades.
Mount with regular drywall or wood screws.
Uses a 6mm rod to stabilize the bottle.

Work in progress. More revisions to come with additional testing. Will upload more Photos/pictures as project progresses.

Update: Complete rework, my skills in modelling and working with the materials has come quite a long way since I first uploaded this. This new version should work much better.