Welcome to our store! Keeps milk warm for hours: This USB bottle warmer ensures your baby always has warm milk, maintaining a constant 40°C temperature to preserve nutrients and provide long-lasting warmth. Heat-resistant material: Crafted from high-quality, safe materials, this insulated bottle bag boasts a smooth and flawless exterior. Low power consumption: Enjoy all-day warmth for your baby with low power consumption, providing constant, gentle heating. Easy to charge: This USB-heated baby bottle thermos is incredibly convenient to charge using a power bank, car charger, or any 5V 2A adapter. Wide application: The practical design makes this milk bottle cover versatile and easy to carry for storage, errands, shopping, and travel. It can hold milk cups, drinking cups, or coffee cups. Your satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!