Instead of a flat bag, I wanted to put a pleat at the bottom of the bag, like the old fashioned fold over sandwich bags. Does anyone remember those? My wonderful mom thought that it would both put less stress on the side seams of the bag, and also help with functionality. What neither of us realized is that it also makes it so the bag can 'sit' on the counter when you fill it, and also in a child's lap helping to prevent spills. This is definitely the way I'll make the bags from now on.