Bests & Worsts Reviews from Amazon

So I've had this ice pack for about a year now. It was the best one out there and I loved it for my migraines. It stayed cold for long periods of time at first and was perfect. But now, it only stays actually cold for about 10-15 minutes and then its not "frozen" anymore. Someone who experiences chronic migraines and needs an ice pack to stay cold for longer then 15 minutes, this was perfect for a while then it just stopped holding its cold factor. I'll love it while I have it and got my moneys worth for about the year or so I've had it. Just sucks that it doesn't keep its cold anymore.