Complete Dispensing Kit: Each pack of Empty Oil Roller Bottles comes with a straw, funnel, and bottle opener, simplifying the process of refilling essential oils, perfumes, and other liquids. Thick Construction: Glass Roller Bottles have reinforced bottle mouths and bottoms paired with sturdy PE black caps, making them resistant to cracks and suitable for repeated use. Leak-Proof Steel Rollers: Empty Roller Bottles feature steel balls that fit tightly to the bottle opening, ensuring smooth, even liquid without unwanted leaks during use. Space-Saving & Portable: 10ml Glass Roller Bottles are compact enough to fit in purses, gym bags, or travel kits, allowing on-the-go access to your favorite liquids. Versatile Refillable Design: Refillable Roller Ball Applicators are ideal for storing and applying essential oils, custom perfumes, massage oils, and more, catering to daily and travel needs.