Bring your favourite fragrance anywhere! Using the complementary dropper, fill the bottle with essential oil or perfume of your choice. FLO JEWELLERY's essential oil necklaces or bottles are made of 100% natural gemstones. The bottle lid and the inner vial are made of well-machined aluminum which will not react with oils. This unique technology is patented and every single bottle is the efforts of more than 100 hours of polishing. Not only is it a piece of jewelry, it is also collectible and wearable art!