Essential oils are affected by extremes of temperature daylight air & damp. They can also corrode materials such as plastic & rubber. This is why Absolute Aromas packages their essential oils in sealed dark-glass bottles with integral droppers so that the chance of spillage is reduced. After purchase they should be stored upright at a steady temperature away from sunlight. Absolute Aromas stocks a range of wooden boxes which are ideal for storing your essential oils at home as well as carry cases for therapists & those on the move.