Water bottle to Bird feeder adapter
thingiverse
An adapter for Water bottles to Soda bottles (water has tighter thread, look at Perrier or supermarket 2L mineral water). This is to use with the Mix and Match bird feeder or anything else you like. I used the 20mm connector from Mix and Match bird feeder, plus the water bottle thread from https://www.prusaprinters.org/prints/70984-bird-water-feeder
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