1. First, prepare the required ingredients, as shown in the following figure:

2. Then peel the banana and cut it into small pieces, as shown in the following figure:

3. Put the banana pieces into the portable juice cup, and then add the milk, as shown in the following figure:

4. Cover the portable juice cup, double-click the switch, and the juice cup will be reversed, as shown in the following figure:

5. Then open the cover, as shown in the following figure:

6. Pour into the cup, as shown in the figure below:

7. Finally, the banana milkshake is ready, as shown below: