Perfume Studio Glass Roller Bottles with Metal Ball Applicator, 10 ML (10, Clear Glass Metal Ball) Set of Clear Glass Roll On Bottles with Metal Ball Applicator and Black Caps. (10 Units) 10 ML / .33 Oz Bottles ~ Metall Ball Applicators Great For Essential and Body Oils Not Recommended to use with high lubricant carrier oils such as coconut or almond oils