| 1. Dark-Colored Glass (Amber/Cobalt Blue) | To Protect from UV Light. Sunlight and artificial light can degrade essential oils, breaking down their therapeutic compounds and altering their chemical structure. Dark glass acts like sunglasses for your oils. |
| 2. Small Size (5ml - 15ml are common) | To Minimize Air Exposure. Essential oils are volatile and evaporate quickly. A bottle that is nearly full has less air (oxygen) inside, which slows down the oxidation process. Oxidation makes oils go rancid. |
| 3. Glass Material (not plastic) | To Prevent Chemical Reactions. Essential oils are highly concentrated and can degrade plastic, leaching chemicals into the oil and compromising its purity. Glass is inert and non-reactive. |
| 4. Dropper Cap / Orifice Reducer | For Controlled, Safe Dispensing. This is a crucial safety and practicality feature. It allows you to dispense oils one drop at a time, ensuring accurate dilution and preventing spills and waste. |