Type 1 How to keep insulin cool while travelling

I usually wet a towel in cold water and wrap it in it , but there are also special thermos bags or a regular thermos for tea

Have a look at current news about temperatures in Spain. They’re high, very high. If it were me I’d think twice about going.
If you do go, though, here are some of the methods I’ve used. Frios (see if you can get express delivery of a couple of Frios), a thermos, an insulated travel pouch, an insulated container with an ice pack but taking care not to put the insulin too close to something that’s frozen. I always make sure there’s a fridge I can use in overnight accommodation.