Food flask ideas

[RapidlyApproachingEndOfMyTether]

I've just bought a thermos food flask for my 9 year old as we have a quick turnaround between after school club finishing and his sport club starting and the child needs to eat! So am hoping this will be the answer otherwise he's going to be living off peanut butter sandwiches!

What sort of things work well in them? I'm guessing things like soups, chilli, pasta bolognese are the obvious choices but hoping for inspiration for other options I could use it for?

Does the food need to be fairly "wet" to stay warm? I'd heat the flask first with boiling water.

Pre-heat the flask with hot water, and it'll keep things like hot dogs, gyozas (we get the veggie microwave ones from the freezer section), and meatballs warm

I think it keeps most things warm fairly easily if it's pre-heated. I always worry about things like chicken but I'm assuming you're doing it and then handing it to him relatively soon after?

My suggestion is on a tangent - we had a similar issue with DS a few years ago and we did quite a few wrap-type things that I could then wrap in tin foil and he'd eat in the car. Fajitas or similar basically. Worked well.

Porridge, dahl, macaroni cheese, stews, risotto, ratatouille.

pasta bake, curry...

Meatballs and spaghetti
Boston beans with bacon https://www.bbc.co.uk/food/recipes/boston_baked_beans_with_57598
Stir fry
Curry
Egg fried rice

Loads of great suggestions, thank you! Boston baked beans looks like it will go down well