Basic pressure for preserves

A basic pressure to keep preserves from spoiling. Print in ABS or other elastic and food-grade material! The default size is for our jars but you should change it as you need. As ABS is elastic, you can bend it to fit it through a bigger hole, so make the X,Y size the size of your jar's neck radius, best if it's bigger. See picture for reference. Pour water up to the pressure. Be careful as the 4 points are brittle. Happy preserving!