I always keep some of those Capri Sun juice packs on hand for the neighborhood kids. We live on a lake and there's always children going by.
I recently had back surgery and needed ice packs to help with pain and swelling. I asked my husband to freeze some of the juice packs to use. They were the perfect size and didn't leak or thaw quickly. I didn't realize the muscles on my chest would be sore too. Each pack fit just right in my top over chest. I guess they would be good too for hot flashes, just slip it in your bra. LOL