All Essential Essence 15mL pure essential oils are supplied in amber glass bottles with built-in dripulator and white tamper-evident cap and may be identified by purple labels. These oils are perfect for many aromatherapy applications, including diffuser use. All oils have been obtained from reputable sources world-wide. They have been extracted by a variety of means and the correct botanical species is stated on each label. You will instantly appreciate the quality of these oils when you smell their delightful aromas. Essential Essence oils are very potent. Less is best. Never apply essential oils directly to the skin unless they have been diluted by a suitable carrier. Always check precautions prior to use.