Because essential oil is an active substance, it is easily absorbed by the human body. It is easy to change color and deteriorate under sunlight, so colored bottles and dark blue glass have short wave absorption. Essential oils will have a long shelf life.

Sunlight, light, high heat and high humidity will destroy the composition of essential oil, so essential oil must be kept in dark glass bottles.

At present, pure essential oils bottles are mostly dark brown, amber, dark blue and dark green glass bottles. Among them, dark blue and dark green glass bottles are more expensive because their essential oils have a shelf life of 6 months longer than those of dark brown and amber.