* Simply fill the dye bottle with the pre-mixed hair dye, then use the pump handle to allow the dye to flow through the comb and it will not stick to the hands. 
* The solution can be applied simply by combing and squeezing, simply by filling the root comb bottle with a pre-mixed hair dye, then using the pump handle to pass the dye through the comb (the graduated bottle) and the liquid flows directly through the hollow tooth to the scalp. And the roots, evenly distributed, not dirty and difficult to use.
* It can be used in many places such as masquerade, family, salon competitions, etc. It can also be used as a dry cleaning bottle or filling bottle during travel to store hair dyes and styling lotions.
* These hair dye bottles are made of plastic, are not easy to break, light and easy to carry, and can be washed and reused for long-term use.