you know humira had passed the approval to be used for quite a few months afterwards at room temperature. not that would have helped for all the pen. I find the ones used to store insulin that you can find on amazon work really well. I wish I could provide you with a link but I traveled for 24 hours from cold(europe) to (africa) with mine and I had the complete opposite problem of keeping them too cold, even after airport security opened them up to swab them.
The trick is ice packs inside a good insulated holder with a digital thermometer on the outside.