Question: To make a piping bag,
Option 0: open a ziplock bag, put it into a jar folding the top over the top of the jar, then fill it with your filling, pull out of the jar, zip lock it, cut a hole in one of the bottom corners, and squeeze the bag to push your filling out.
Option 1: open a ziplock bag, put it into a jar folding the top over the top of the jar, then fill it with your filling, pull out of the jar, cut a hole in both of the bottom corners, and squeeze the bag to push your filling out.
Answer: 0