How to Make: Essential Oil Roll On Blends. The Art of the Roll On Remedy Step One: Choose a Roller Bottle When blending essential oils it is best to always choose a bottle with tinted glass. Oils deteriorate and oxidize over time when exposed to light. So avoid clear glass bottles, or bottles that have been painted. Always pick tinted glass bottles. For a convenient travel size roller choose a 10ml or 1/3 ounce Roll On Bottle.