Pvc Hot Water Bottle for Headache Cramp Cute Water-filling Hot Water Bag for Neck Shoulder for Period Hot And Cold Therapy 1. High-quality material: The bottle is made of high-density PVC, which does not have a strong smell like the classic rubber. The 2mm thick inner wall can effectively reduce the loss of temperature. It adopts high temperature and high pressure forming technology, 185 degrees high temperature forging, strong explosion-proof, high pressure resistance, and no need to worry about expansion under high pressure. 2. Keeps You Warm for Hours: The Love pattern with Lid is designed to retain heat for your comfort. The surface is designed with a round textured non-slip that provides insulation and a firm grip, while the other side is flat with a heart pattern for even warmth, not hot to the touch, choose your favorite side and enjoy a relaxing experience. 3. Easy to use and leak-proof: Its large water filling port is easy to fill and use, and it comes with a screw-type sealing cap, which can be screwed and closed smoothly to prevent water leakage. 4. Versatile Love Hot Pack: Ideal for pain relief and relaxation, the hot pack is multifunctional. For menstrual cramps, menstrual cramps, hot and cold therapy, stomach pain, back, neck and shoulder or leg muscle pain, or as a foot warmer. It's perfect for snuggling on the sofa or keeping warm on a cold winter night. Precautions: 1. The cover is an important part to prevent water leakage and cannot be damaged or lost; 2. When injecting hot water, avoid direct boiling water, the water temperature should not exceed 80 C, and the water filling volume should be 3/4; 3. Pregnant women should not use a hot water bottle to press their stomach, and children under 5 years old should not use it.