The bottle warmer is designed for travelling and is suitable for warming water, milk or baby food. There is no explicit indication that it is specifically compatible with Avent bottles. Due to its design as a mobile bottle warmer with a volume of 340 ml and the description that it is suitable for various liquids, it can be assumed that it can also warm Avent bottles, provided they fit into the device. However, there is no official confirmation of compatibility with Avent bottles.