Fits Most/All Bottles: The bottle warmer is designed to expand up to 3.25" in diameter, making it suitable for holding bottles of various sizes. Note: Warming time frame depends on the starting temperature of the milk. Frozen milk or ice cold milk may take up to an hour to warm in the warmer.<br>Efficient Warming: The device is designed to heat up your baby's bottle in just 20 minutes and can stay warm for a generous 2-3 hours on a full charge. With 4-5 heat ups per charge, it provides reliable warming for your baby's milk. It features 6 temperature settings, including body temperature (37C), warm (40C), and very warm (45C), with additional options at 42C, 40C, and 55C. 6000mAh rechargeable battery is included.<br>Portable and Travel Friendly: Ideal for on-the-go parents, the bottle warmer can easily fit into diaper bags, strollers, backpacks, and other on-the-go accessories, allowing you to prepare a bottle for your baby whenever they need it.<br>Exquisite Material: Features an adjustable wrapping velcro bottle grip made of faux leather on the outside and advanced reflective material on the inside, which heats quickly and retains heat for longer periods.<br>Battery Indicator + Flashlight: The battery indicator lets you know when it's time to recharge the battery, ensuring that you never run out of power. The included flashlight offers added convenience in low-light conditions. Comes with a USB-C charging port, making it easy to charge the battery from various devices.