Keeping food chilled throughout a duty.

[Amadis of Gaul]

This is what I use. It's basically two bags in one, a laptop/iPad bag and a lunchbag.

https://www.aerocoast.com/aerocoast-...ndant-bag.html

I do carry an icepack, because my trips are usually 4 days (I don't do day turns), but it would work for a day without an icepack.