I'm looking for a thermos bowl that I can use for work, something that will keep my food hot for about 5 hours so that I can have hot food for lunch. I only get a 20 minute break, and with all the one way systems at work, I don't have time to heat up my food and eat it.
I have looked at the actual "thermos" bowls, but at £20, they are a little over my budget, any suggestions please?