2_Liter_Soda/Pop_Bottle_Adapter_Template_V3_By_Azriel.stl

Did this in free cad cus im broke :). tight fit at first. slowly tighten further and further till the plastic bottle meets the O-ring. go back and forth if its too tight. this will soften the plastic to move on further. anyway this is just the first air tight prototype have fun!