simply use temporary hair chalk pens

{"cid":"91181414","title":"Empty Nail Oil Pen With Brush Liquid Foundation Refillable Bottles 2ml 4ml Hair follicle nutrition pen tube","imgUrl":"https:\/\/img.chinax.com\/nimg\/80\/b6\/396b1559248618620f891b71005a-200x200-1.jpg","attrs":{"Price":"$0.29","Brand Name":"NAMEI","Model Number":"E-813","Minimum Order Quantity":"12000pcs","Delivery Time":"30days","Place of Origin":"CHINA","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"500000 per week","Suitable For":"Professional And Personal Use","Product Type":"Nail Art Tool","Design":"Slender And Lightweight","Function":"Create Nail Art Designs","Material":"Plastic","Use":"Eye","Easy To Use":"Yes","Color":"Customizable"}}

{"cid":"91202389","title":"30ml Squeezable Plastic Dropper Bottles For DIY Essential Oils Perfume Oils","imgUrl":"https:\/\/img.chinax.com\/nimg\/2d\/61\/6a2540d877f0a16e321d2a1b0cf4-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"beifeng","Model Number":"BFF-006","Minimum Order Quantity":"10000pcs","Delivery Time":"10-30days","Certification":"SGS","Place of Origin":"Zhejiang, China","Payment Terms":"L\/C, D\/P, T\/T","Supply Ability":"100000pcs per day","Packaging Details":"PP bags \u2192 Cartons\/customized","Sealing type":"Dropper","Material":"Plastic","Surface handling":"Screen Printing","Plastic type":"PET","Use":"Essential Oil","Color":"Transparent\/White\/customized"}}