Multifunctional bottled water heater

Used for heating bottled water, this device can also be used as a nightlight, a heater, and a pen holder—very practical.
The design theme is rocket-themed, and it looks quite attractive from top to bottom. The bottom features four LEDs for illumination and colorful PCB silkscreen printing, making it quite aesthetically pleasing.
The entire shell is 3D printed, reinforced by four supports, maintaining a certain thickness and using substantial materials.
The heating element uses a carbon fiber heating module, which is very practical and available for around 3 RMB on Taobao. Because the heating is very slow, there's no need to worry about overheating.
See the attachment for the 3D design results.
The electronic circuitry consists of three main parts:

a power interface circuit (powered via a Type-C interface, supplying power to the logic and lighting circuits)
, a control logic circuit (using a C51 microcontroller to control the LEDs and heating plate), and a
lighting circuit (using colorful silkscreen printing and four LEDs for internal lighting).

All these parts need to be fixed inside the heating tank.
The control logic circuit has an opening on the panel for operation.
The heating container can hold standard-sized purified water and mineral water, heating it to around 40 degrees Celsius, which is perfect for drinking.
Finally, it's given to the children to draw on.