Filastruder Hopper Neck Extender (2L bottle -> 1" PVC coupler)

The neck of my 2L bottle Filastruder hopper was too short. I was in the process of just redoing it in OnShape, but then I figured it would be easier to just make an adapter to extend the opening.

There is are two pieces: a male and female coupler that attaches to either end of a 1" PVC pipe.