Small PET automatic water feeder

"Save a PET bottle", give it another live.
This design uses a PCO 1881 conform thread standard, used on new PET bottles.
Design was made using Autodesk Fusion 360, as learning project for thread design.
I learned there are many different PET bottles, this design is compatible with commonly used bottle shapes in Belgium/Netherlands.
I've made 2 version, one with extra support to increase stability when using full bottles.
Before printing, check the bottle shape !
Don't waste more plastic, the intend is to save a PET bottle.