When the temperature drops or aches and pains flare up, reach for the natural, soothing relief of our 2-Pack Hot Water Bottles. Designed with your comfort and safety in mind, this set provides reliable, long-lasting warmth to help you relax, unwind, and ease discomfort wherever you are. Soothe Period Cramps: Apply gentle heat to the abdomen for natural relief. Ease Muscle Stiffness: Target sore backs, necks, and shoulders. Warm Your Bed: Place it at the foot of your bed to warm up cold sheets on a winter night. Cool Sprains & Injuries: Use as a cold pack by filling with ice water. Use Instruction: 1. If the hot water bag has a smell, please wash it before using the hot water bag. 2. First open the cap, then fill two-thirds of 80 degrees of water into the rubber water bottle. Finally, tighten the cap and turn the warm water bag upside down to check for leaks.