FreePCO1881 / PET / soda bottle air lock
Thingiverse
8 model
Free
FreeMagnetic bottle transfer caps for PCO1881 threads
Printables
FreeFunnel
Printables
FreePCO-Bottle Drying Stand
Printables
FreeFunnel with PET bottle thread
Printables
FreeCap Twister
Printables
FreeWatertight Roundbox using Soda Bottle Cap (PCO1810)
Thingiverse
FreeWater Bottle Twist on Funnel ( PCO1810 )
Printables