Perfume Studio Set of Amber Roll Ons with Metal Ball Applicators - Tested Against Leaks! 10 ml (5, Amber Glass Metal Ball) Perfume Studio Set of Amber Rollers With Metal Ball Applicators - 10 ml / .33 Oz 5 Pieces, White Cap Roller Bottle is Specially Designed For Body and Essential Oils Great Rollon Bottles For Travel. Reusable... Dark Amber Glass Shield Protects Oils Against UV Light Tight Metal Ball Housing Mechanism in Roll-On Bottle Prevents Leaking from Your Precious Oils. (Please see product description below for more information)