winter warm cartoon hot-water bag 1000ml irrigation hand warmer cute hot water injection bag in stock wholesale

2026 new hot water bag, made from safe and explosion-proof materials, certified by 3C, providing comfort during the winter. Smart constant temperature control, one-touch operation, eliminating the hassle of traditional filling. Thick inner container ensures heat retention for 12 hours. Soft and skin-friendly, helping to relieve menstrual cramps and back pain. Lightweight and portable, suitable for offices, bedrooms, and travel. Energy-efficient and eco-friendly. Choose us to keep you warm through the cold winter and pamper yourself.