@welroleather: Apply Hair Oil Without the Mess! Tired of oil spilling everywhere or wasting precious hair serum? Our Large Capacity Hair Oil Applicator Comb is designed to deliver oil directly to your scalp while gently massaging for better absorption and healthier-looking hair. Simply fill the bottle with your favorite hair oil, press gently, and let the roller ball distribute oil evenly through the comb teeth—no messy hands, no product waste.