1000ml warm belly hot water bag can be customized factory direct sales as gifts

2026 new hot water bag, equipped with a smart constant temperature chip. Say goodbye to the cumbersome process of filling water, and enjoy safety and explosion protection. Made of high-quality thick PVC material, it is leak-proof and pressure-resistant, with 3C certification for added peace of mind. Say goodbye to cold nights—warmth will help you fall asleep. Suitable for various scenarios. Packed in a gift box, ideal for personal use or gifting.