Firecracker has been in need of a lunch bag for the days she brings lunch from home. I bought a thing of Caprisuns at Costco last time I was there as a special "sometimes" treat for her lunch. As you can see...we've gone through more than I originally intended. School lunch (which is not all that healthy) here is free for everyone, so it's been a bit of a challenge to convince her to take lunch from home. For now we have a deal...two days a week of school lunch and three days a week sack lunch.
I basically just followed the directions on the above link, with one change. I trimmed the front down and tapered the sides a bit, so the back could fold over easier and then it only required one set of velcro.
Then I zigzagged sewed those raw edges to make sure they held together. I also used sew-on velcro instead of the sticky-backed stuff.
At first I thought it looked to big, but then when I went to fill it, I realized it was just the right size.
Firecracker is happy with it...but still begs to eat school lunch as often as she can.