A Poucho case is easily activated with just water. These handy cooling wallets for people with diabetes are shipped from the USA by Medicool.

Keep your insulin cool without refrigeration! Duo-Pen for one or two pens, Large for pens and bottles.

Keeps insulin bottles or pens cool without refrigeration.
Activate with just tap water.
Great for active travelers.
Can be used and re-activated a hundred times.
Stays cool up to 4 days.