Probably a stupid question but help!
I'm going away soon and will be in the car for about 5-6 hours (it's a long journey and we'll be breaking for lunch on route).
I've ordered one of those tote cool bags to transport some food, which is arriving soon. My question is - do you need to put ice packs in the bag or do they keep the food cool just through insulation or something? 
I'll be taking food from the fridge and freezer that I hope to transfer back to fridge/freezer at the other end.
Sorry, not an AIBU I know but am posting here in the hope of quick advice.
Thanks!