Leakproof design, tight screw thread caps.they any liquid leakage and are great for travel Easy to carry, the essential oil roller bottles / dropper bottle small size is easy to carry, you can take your favorite perfumes or essential oils with you when you travel perfect to put in any type of bag such as purse / crossbody bag / cosmetic bag / backpack without taking up your space Materials, essential oil bottle make from full of durability glass, not easy break up There are 3 styles optional, you can choose follow you need Wonderful gift, sweet warm friend family and yourself