food safety

Packing Soup for Kindergartener

I've never worried before about packing soup in a thermos; it has always seemed really straightforward. My kindergartener has just requested miso soup for his lunch. I'd love to send some, but I'm nervous about sending a thermos full of hot soup for a little guy (fearing scalds). Is it safe to pack it less than boiling, piping hot? Or should it cool down between 6:30 and 11 am enough to be pleasantly warm instead of scalding?
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How many hours is a bento really safe at room temperature?

Hello! I'm really new at making bentos, and the thought of leaving my bento out of a refrigerator makes me a bit nervous, and I wanted to ask your thoughts. You see, I have to leave my house very early in the morning (around 5:50 am) to get to work on time during the summer, and I typically don't eat lunch until 12:00. I'm worried that leaving my bento out of the refrigerator for 6+ hours would be unsafe, but the thought of eating ice-cold rice from the fridge isn't exactly appetizing to me either! :\
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