The Unique Hair Smear Bottle Design Provides Great Convenience When Dyeing At Home. You Never Have to Worry That This Bottle of Dye Will Waste Dye and Attach The Comb, Which Is Easier to Dye Than Traditional Methods. .The Solution Can Be Applied Simply By Combing and Squeezing, and The Liquid Flows Directly Through The Hollow Teeth to The Scalp and Roots, Evenly Distributed, without Soiling and Ease of Use. .Simply Fill The Bottle with Pre-Mixed Hair Color and Use A Pumping Handle to Allow The Dye to Flow Through The Comb, The Graduated Bottle, and Easily Mix The Chrome. .Light Weight. This Product Is Easy to Carry and Travel. It Is Easy to Wash Your Hair Even On The Go. You Don'T Need Oily Hair to withstand Bad Feelings.