Keep your aromatherapy blends or massage oils fresh for years and incorporate science into your collection with the Glass Steel Roller Bottle Variety Pack. Included in this set are six steel roller bottles in varying capacities, ranging from 5 ml to 100 ml. Designed in Europe using tough ultraviolet glass, these bottles prevent visible wavelengths from entering and ruining your products while letting in beneficial rays to sanitize them. This ultraviolet technology, along with the bottle’s airtight caps, preserves the potency and fragrance of whatever you put inside. And unlike plastic rollerballs, their stainless steel rollerballs can withstand even the most potent oils. Combine a sleek design with lab-optimized air and sunlight protection, and what you’ll have is a set of bottles that can secure the freshness of your blends in style! What's Included? 1 100 ml Steel Roller Bottle 1 50 ml Steel Roller Bottle 1 30 ml Steel Roller Bottle 1 15 ml Steel Roller Bottle 1 10 ml Steel Roller Bottle 1 5 ml Steel Roller Bottle