We use the bentgo lunch containers and their lunch bags that everything fits nicely in are from target. The brand is Fulton Bag Co. They fit the bentgo boxes perfectly with room for extra stuff.
They are the ones who pick their lunch from the options available and that is because if they pick it they are more likely to eat it. But keep in mind they only have 30 mins to eat and sometimes they talk too much etc and don't finish. Other times because they get free lunch at school they eat some of what I sent and some of the school lunch. But most importantly kids tend to eat in cycles and I don't force them to finish food if they say they are full and neither does their school. 🤷🏻♀️