lunch for hubby

I need lunch ideas to make for my husband for work. He just got a new job and NEEDS to stop spending money on lunch and just take it, but I pretty much have to get on him or he won't do it. So anyways the problem is they don't have a fridge and he has to have a clear sack or something clear to bring lunch in. So not sure what to make for him that he doesn't have to keep it cold or heat it up because I don't think they have a microwave either. And if there's a clear lunch box I can buy or something.