Details Where the recovery-revolution started. The original full-size Pain Cake is the world’s first cold pack with proprietary Stick & Stay Technology. Pain Cakes provides targeted cold therapy to surrounding aches, pains & post-workout stiffness with waves of cooling relief. Simply chill, peel & stick — anywhere! Pain Cakes sticks & stays! No straps. No tape. Hands-free! You’ll never use a bag of peas again!