essential oil roller bottles 48 pack 10ml - ulg cobalt blue glass empty bottles with stainless steel roller balls (10 extra roller balls, 4 openers, 4 droppers, 48 waterproof labels) ulg make your own pre-diluted roll-ons with our amber glass roll-on bottles. these 10 ml roll-on bottles are the perfect size to make it easy to take your roll-ons with you. this pack contains 12 roller bottles allowing you to make the roll-ons of your choice using your favorite plant therapy essential oils and carrier oil. put it in your purse, your pocket, or in a desk drawer at work. this small bottle will not take up much room, but will have your oils ready to use whenever you need it. the amber glass protects and preserves your oils against outside elements and damaging sunlight. easy to use and convenient packaging makes it easy to take your pre-diluted roll-ons anywhere you go and be ready to use!