Efficient Heat Preservation: Daily continuous heat retention with a multi-layer nanometer-temperature locking system for extended warmth. Thick PVC material enhances insulation, providing all-day heat without loss. Safety and Durability: Pressure-resistant and explosion-proof design ensures a secure experience. High-temperature forging creates a watertight structure capable of withstanding high pressure, offering peace of mind during use. Comfortable and Safe Usage: Insulated to prevent burns, the thick plush material effectively separates the heat source, preventing overheating. Suitable for all ages, including the elderly and children, ensuring a cozy experience without safety concerns. Enhanced Warmth Retention: High-density thickened velvet doubles the warmth retention performance. Soft to the touch, breathable, and gentle on the skin, providing layer upon layer of protection against the cold. Versatile and Cozy Design: Combining functionality with comfort, this hot water bag offers not just warmth but also a luxurious feel. Ideal for various applications, it delivers consistent heat for ultimate relaxation and well-being. Description: Introducing the Hot Water Bag, your perfect companion for daily heat preservation needs. This innovative product ensures continuous heat retention throughout the day, locking in warmth effectively without any loss. Crafted with high-quality materials, it is pressure-resistant, explosion-proof, and watertight, guaranteeing durability and safety. The multi-layer nanometer temperature locking layer significantly extends the heat preservation duration, while the thickened PVC material enhances the overall performance by doubling the insulation capabilities. The design ensures that the warmth is comforting without being excessively hot, making it safe for use by both elderly individuals and children. With its high-density thickened velvet construction, this water bag offers double the warmth retention performance. The soft texture provides a comfortable feel, while the breathable fabric ensures skin-friendly usage. Item Name: Hot Water Bag Material: PVC Capacity: 350/800ML Features: Heat-resistant, Leak-proof, Body Pain Relief Size Details: 350ML, L: 15cm/5.91", W: 15cm/5.91" (Approx.) 800ML, L: 25cm/9.84", W: 16cm/6.3" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Hot Water Bottle