Versatile in power options, the bottle warmer can be powered via USB from a power plug, car charger, or power bank, offering flexible charging solutions for different environments and ensuring mothers can keep milk warm anytime and anywhere. The user-friendly design ensures quick and effortless operation with a compact, lightweight structure that makes it convenient for night feeding or outdoor use, significantly reducing the stress involved in feeding times for mothers. Constructed with high-quality and durable materials like waterproof oxford cloth, soft flannel, and a composite heating sheet, the warmer is designed to be anti-leakage, dustproof, and long-lasting, with a handle for easy portability during outdoor activities or travel. Its wide application capacity enables users to heat and maintain the temperature of various beverages, including soy milk, coffee, juice, water, and milk, making it highly suitable for hiking, shopping, traveling, or overnight feeding situations on the go. This portable USB baby bottle warmer features adjustable temperature settings across three gears—40°C, 50°C, and 60°C—allowing users to select the optimal warmth for their baby's milk or beverages, ensuring tailored comfort and safety.