Canning Jar 4-way adapter

thingiverse

Yet another multi-jar-printing project! I already had the 2x and 6x sizes, so why not add the 4x one? The fit could be a bit tighter; maybe I'll tweak it later. Alternatively, try scaling down to 99 percent. If you get it too snug, just pop a jar in the oven for a while, then slowly and carefully screw it on with a hot pad. Considering using a brim is a good idea. The baked-in supports inside the top need to be trimmed after printing, especially around the threads. No supports are needed if your printer can handle 70-degree overhangs.