Trichter für PET-Flaschen / Funnel for PET-Bottles

I needed a Funnel to fill my drinking bottle at work with sparkling water. I tried the excellent PET watering Funnel ( http://www.thingiverse.com/thing:1230493 ) but it is better to pour something out of a PET-Bottle than filling. So i made my own attempt on th problem...

https://youtu.be/YJwaIjUhx4c

Update: If you are in a rush and if you have a spare PET bottle at hand, print this Thing: https://www.thingiverse.com/thing:897760 and cut the spare bottle to get a also great working funnel.