welcome! I remember when I was young my mom used a frozen juice box as an ice pack - worked perfectly and there was nothing to remember to bring home. I don't know if they're actually safe to freeze, but if they are and you send juice with your son, that might be another option!

Thanks! Don't know why I didn't think of that -- ice pack is the perfect solution!

With an insulated bag and an ice pack, sure. It will be fine for 3 hours that way. With nothing to keep it kind of cold until lunch, though, I wouldn't do it.

Lunches are not refrigerated. My kid is a super-picky eater but has been on a tofu-dog kick lately. Would it go bad if it sits out in the heat for 3 hours? TIA!