Foam Lance bottle cap

thingiverse

Typically, Foam Lance bottles arrive without a cap, which allows you to store washing liquid inside the bottle. The cap fits perfectly onto bottles with 1-inch pitch and 4mm threading. It's highly recommended to print the cap at a 45-degree angle to prevent splitting of horizontal layers during tightening. Additionally, some extra filament flow may be necessary to reinforce the object. The original cap often struggles with layer adhesion, but a thicker one should do a better job of securing it in place.