Yes, the bottle warmer can keep water and solid food warm using the bottle or dinner mode.
To do this, add 200 ml of water to the reservoir and place the bottle or food jar inside. Then select bottle or dinner mode on the display, set your desired temperature, and the warming process will begin. The bottle warmer will automatically switch off after 10 hours in bottle mode or 3 hours in dinner mode, though you can stop it manually at any time.
Please note that keeping food warm for extended periods is not recommended, as it may affect quality.
For detailed instructions, refer to the user manual.