Looks great but don't do the job well
"I bought this set thinking it would be good for work lunches. Unfortunately, comparative to other food flasks I've used I find that these don't work very well to retain the food heat or cold. I am diligent with the preheating or precooling but unfortunately these just don't compare to others in the market. It's a shame, I bought them because I have so much Frank Green stuff and expected the same quality."