AUVON Insulin Cooler Travel Case with 2 x 90g TSA Approved Ice Packs, Diabetic Medication Insulated Cooling Bag for Insulin Pens and Diabetic Supplies Storage, Compact for Daily Life and Trips

A full-on cooler or Dewar flask (thermos) is overkill, but a small pen case with removable chill packs would be useful. These are sold as a "insulin pen case". Basically just a small one, preferably with foil liner (see images when looking online). The removable chill packs are pretty much a standard size and convenient for separate storage in the freezer and can be left out of the case if not needed. Some have digital thermometers, but I think that's unnecessary. I got one with thin foam insulation and a foil liner such as the basic case sold as AUVON.

My husband frequently travels to the Arabian peninsula. He uses this case. AUVON Insulin Cooler Travel Case... https://www.amazon.com/dp/B0CRDXPBFF?ref=ppx_pop_mob_ap_share