Mr S destroyed his lunch bag (zipper failure) and since I sew in a pre-zipper era, I declined to hunt up a new zipper and set it into the weird amalgamation that is the modern insulated lunch bag. I can’t even remember how old that lunch bag was, but it might have been six years old. So out we went for cat food (which happens a lot) and a lunch bag.
This one seemed like it would be too small, but it does hold his entire lunch. And then I realized it would fit nicely into a haversack if one needed to pack a cold lunch on a hot day. You just have to be stealthy when opening the thing, at least until the velcro gets linty and quieter. This bag is lined with freezable something that serves as the ice pack, which does save space and should be more efficient and safer on a super-hot summer day (I’m looking at you, Cambridge in July.)
And, as ever, if you wrap your meal in tinfoil and baggies, hide it from the public. The best way to use it at an event would be to pull paper- or linen-wrapped period food from its hidden, chilled (shallow) depths. If you are not in the army, it goes in your market wallet, linen bag, or basket, not your haversack. Now, perhaps those cats can help me silence the velcro.