Smooth glass roller heads on these Refillable Roller Ball Applicators ensure consistent, controlled dispensing, so you can apply oils or cosmetics without waste. The transparent blue glass body of these Empty Rollerball Bottles is easy to clean and allows you to monitor remaining product levels effortlessly. Each 10ml Roller Bottle features a compact design that fits neatly in purses, backpacks, or travel bags, making it ideal for on-the-go touch-ups. black plastic caps on these Oil Roller Bottles create a tight seal, preventing leaks and preserving the freshness of your contents. These Glass Roller Bottles are perfect for refilling with essential oils, perfumes, or liquid cosmetics, a reusable and sustainable storage solution.