You can get quite large gel packs which take longer to defrost and to warm up. I have one about A4 size and some smaller ones and that’s what got me through our heatwaves a couple of years ago. I think even larger ones exist.
Cool Pak I got the “luxury” ones that are dark blue from some kind of nylon material rather than plastic. I’ve had them nearly 10 years.
Cool Pak I got the “luxury” ones that are dark blue from some kind of nylon material rather than plastic. I’ve had them nearly 10 years.