new u-shaped hot water injection bag cervical cold and hot compress neck protection heating pad

2026 new hot water bag, made of explosion-proof material, with triple temperature locking technology, maintains constant temperature for 8 hours, eliminating the need to refill water frequently. Upgraded and thickened inner container, leak-proof and heat-resistant, with complete safety certifications. Soft and skin-friendly, providing warmth, helping relieve menstrual cramps and cold sensitivity. In winter, it is your thoughtful warm care product, protecting every cold night.