"When your vet prescribes cold therapy, an easy and inexpensive method is to pour Palmolive dish detergent into a heavy resealable plastic bag and put it in the freezer. The detergent does not freeze solid (other brands do.) In a few hours you’ll have a fully flexible cold pack. Contour it to your horse’s leg, holding it in place with a self-adhesive elastic bandage. The detergent is nontoxic, so if a bag leaks or breaks, the liquid can be washed off. Reusable."