I am looking for some lunch jars for my kids because I'm not sure if they have microwave privileges. I would want to send stuff like stew, chili, soup, etc. The only two I've found that look okay are the large Laptop Lunch thermos and this Fuel thermos - <a href="http://www.fenigo.com/FuelThermal.htm" target="_blank">http://www.fenigo.com/FuelThermal.htm</a> , I'd probably get the large one. Any input on either of these two thermoses would be great. Do they actually keep food warm? Are they easy for little ones to open? Are they the right size for a school lunch? Any help appreciated!