Polar Pack Flexible Hot/Cold Packs
I have had my old Polarpacks for about 8 years. Yes, they lasted that long and worked that well. If it weren't for a puppy who decided that these were pretty and chewable, they would have lasted even longer. Throw them in the freezer, adjust them into the position and place you want them to be, and, voila, you have a cold pack that works for a nice long time. The recommended time is 20 minutes, but when I have a migraine, the polar pack behind my head helps me to sleep. Migraine pain is horrible and this helps me sleep through the night. I LOVE THEM!!!!!