a. You can make the colors of the mouthpiece, surface, sides, indicator lights and signals in any color you want.
b. The lighting and oil windows can be customized for free in different shapes.
c. The tank tank can be customized such as 0.8 ml, 1.2 mm and so on.
d. You can print labels on the front, back, sides and anywhere you want. There is still room to print flavors.
In a word, there are endless possibilities to make a special edition for your brand, feel free to beat me to discuss a perfect solution to make a unique design on it.