pvc water-filled hot water bag 1000ml explosion-proof cartoon with cloth cover winter warm artifact

2026 new hot water bag, featuring graphene rapid heating technology—heats up in just 3 minutes and maintains a constant temperature for 12 hours, eliminating the need to refill water frequently. Medical-grade explosion-proof material with safety certification for greater peace of mind. Soft, skin-friendly fabric for superior comfort against the skin. Smart temperature control and burn prevention design make it suitable for both adults and children. Enhanced leak-proof sealing ensures no water leakage, making it an excellent companion by the bedside. Warm hands and feet in winter—ideal for giving to parents or friends to convey warmth and care.