Can you pack her a lunch box? I normally do cold things for my 10 month old. I find things like little egg muffin things are good for lunch boxes, fruit, rice cakes or pastry things like pizza rolls, or even cold pasta. I then put an ice pack in with it xx
You could heat it up before you go and put it in a thermos flask and it should stay hot!
I just always go somewhere and ask for a bowl of hot water to stand a pouch in. If there’s nowhere to go then I’d take a flask and a bowl to stand it in
Can she eat solids such as the veggie melts or is she still on purees? If she can eat solids id take stuff flike that rather than a heated up meal if possible. If not then take a flask of hot water and a plastic cup & put the jar/pouch in there just before serving to heat it up