Have you ever wondered how many sandwich bags you actually use (and throw away) during the school year? Well, I was curious enough to do some rough maths. A typical school year in my area is 180 days. We usually average four baggies a day . . . which adds up to about 720 baggies each year! Sandwich bags may not be super-expensive, but 720 of them do create a lot of waste. For the cost of two large boxes of sandwich bags, I got two Stasher Reusable Silicone Sandwich Bags ($12) that will last well beyond the current school year. After a full year of use, ours are still in like-new condition.