Aura Cacia amber glass roll-on bottles are designed for creating, using and storing homemade products. Amber glass bottles are hydrolytic-resistant, and help filter both UV and blue light, protecting the oils that are inside. For these reasons, amber roll-on bottles are perfect for essential oils and DIY aromatherapy projects. Aura Cacia empty roll-on bottles have writable labels, making them perfect for your next homemade essential oil perfume, spot applications, and ideal for on-the-go!.