Edit: This thing is not finished it got some problems about watertightness. Maybe you guys got any ideas of fixing that problem. :) What do i have to explain for this creation ... :) Its an adapter from a bottle to half inch thread (thread outside). I created this for a nice drinking machine controlled by an arduino uno. i printed this with pla (food safe) and used a welding torch to weld the single layers. works very fine and its watertight after that process. Have fun printing !!