DIY enthusiasts, this 50-piece set of roller bottles is perfect for all your essential oil creations! Each 3ml bottle measures about 15mm in diameter and 35mm in height (43mm total with cap), making them the ideal portable size for purses, travel kits, or gift sets. The clear glass lets you see your blends clearly, while the black lids and stainless steel roller balls give them a professional, finished look. The stainless steel balls are the real star here - they glide smoothly and dispense your oils evenly without leaking, which is a common problem with cheaper rollers. Whether you're making custom essential oil blends, perfumes, roll-on aromatherapy, or even lip glosses, these bottles handle everything beautifully. The fact that they're refillable means you can use them over and over, making them both economical and eco-friendly. The 50-piece quantity is perfect if you make products to sell, want to create multiple blends at once, or just like having plenty of backups. They come with two bonus 3ml droppers too, which is handy for precise measuring. Cleaning is straightforward, and the durable construction means they won't break easily during normal use. If you're tired of poorly made roller bottles that leak or don't dispense properly, this set provides reliable performance at an amazing value. Seriously, whether you're a serious essential oil user or just getting into DIY body products, these roller bottles will become your go-to containers for all your creations!