Please tell me your go-to lunchbox choices for young teens. We've got into a rut of cheese roll, cheddars and malt loaf bar or banana, which isn't the best. DC won't take a cool block or insulated bag (not cool apparently), and they want things that are easy to eat standing up (lack of seating). They're carting it around for 6 hours before they get to eat it, so it's got to be things that don't need to be kept cold. Thank you!