Grilled cheese at school

I've been considering making a grilled cheese in the morning before school and bringing it. Any tips to keep it fresh and not soggy? I have a thermos, but I'd have to cut it in a weird way to fit it.

The toasting idea will work. Toast the bread, then very lightly butter the toast and fry it like a normal sammich. Be careful though, it gets crunchy enough to shred the roof of your mouth.

Also, wrap it in a couple paper towels, parchment, or wax paper and put it in a paper bag. Don't wrap in plastic or foil.