Primo Water Bottle 5Gal Cap

thingiverse

Primo Water Bottle 5Gal cap. I have several options: 1) primo water bottle cap medium v3 - is my main one, it is not too tight and not to loosen, fits perfectly and doesn't take too much of the material to print 2) primo water bottle cap medium - is a super-tight version, it will take you some practice to put this cap on the bottle first, but it is great to keep it on and tight (e.g. for the transportation purposes). Try to wash it with a warm/hot water to make the material a bit more flexible if you can't put this version on the bottle.