Sterling silver fitted around cap for essential oils roller bottle. The bottle is 3 ml. You can fill it with your essential oil blend or I can fill it for you for the first round. .. message me. Also the plastic roller ball fitting can be removed and you can put whatever you want in the little bottle. Micro treasures are so precious. Sand from your favorite Beach, or micro shells and seaglass. Perhaps moss, or a micro feather. The possibilities are endless. This one adorned with a night in nature.