10 ml glass roller bottles for your favorite blends! Use your essential oil blends anytime, anywhere with these glass roll-on bottles. In amber or cobalt blue, with frosted glass roller ball applicators, these bottles fit easily into a bag, pocket, or drawer. Fill them with carrier oil, add your drops of essential oil, and snap the roller-ball top into place. A simple, fun way to use essential oils! *Please note amber roller bottles will come with silver caps