Filastruder Vertical Bottle hopper deep throat version ;-)

Like this thing a lot, but after revising I saw that the throat was narrower at the bottle end of the tube, and decided I wanted it to be the same width all the way down - this change was made making the end just under the bottle to be a little deeper.
Also widened very slightly and added a thread, to be able to use 1.5L PET water bottles instead of gasified drinks plastic bottles, as they seem to have a different thread...
And finally reduced from 6 to 4 M4 screws, as I found that it was a pa