I drew a template on a manilla folder, and stitched up two of the bags just like the ones I saw. By this time, Miss Kinder had some ideas of her own, which included making a bag for them to go inside as well as another shape. Her ideas were either a heart or a star, but I nixed those figuring they would just store crumbs, so I went with a half circle. But the real victory for me was the owl-looking hard boiled egg holder, since she eats these pretty regularly. This required me to get my spatially thoughtful Other Half to help draw a template that would work, but we did it.
Miss Kinder also decided she should have a cloth napkin for her lunch sack. She's been coveting the two fabrics I used since I brought them home from Alewives Fabrics and her love of them was reason enough for me to cut into them.
I used this tutorial from Jumilla Stories for the lunch sack, which was really easy. The only advice I'd offer if you try this would be to loosen the tension on your machine a bit so it moves through the oil cloth easily. I learned this the hard way.