Convenience: Designed to be lightweight and portable, it is convenient for parents to use during outings, daily trips or night feedings, and can be easily put into backpacks, mummy bags or prams. Heating Method: Usually connected to the power supply by USB port, the bottle is heated by low-power heating element, which can keep the milk in a suitable temperature range and adjust the temperature as needed. Compatibility: Most portable bottle warmers are compatible with a wide range of brands and models of bottles, and common straight and scalloped bottles are basically suitable. Safety: Made of high-quality materials, non-toxic and odourless, harmless to the baby's health. Some products also have overheating protection, when the temperature is too high will automatically cut off the power to ensure the safety of use.