I pack my both my husband's and my son's lunch for school so I use alot of baggies. I really wanted to get away from throwing so much plastic and money away, so, after an entire summer of reducing usage and testing out other options, I found one!! I bought some Ziploc divided containers with sealing lid.
You can buy a two pack for approx $2.40. They are washable and reusable. Mine have lasted more than 3 months without any leakage. I pack my husband's lunch in them almost everyday. The large section holds a large sandwich or entree, the side areas hold the pretzels or snack, and a fruit or yogurt. They do not leak into each other as they seal around each individual compartment.
I even bought Blake's lunchbox according to whether it would fit this container. I found this lunch bag at TARGET for $12...it was the largest "back to school" purchase! Hopefully worth it since you can carry it upright or sideways, it fits my reusable container, AND has a place for his thermos. It even has an outer pouch for dry snacks or napkin and plastic wear. It is made of an anti-microbial fabric.