Dealing with spilling your stored oils or liquids doesn't have to be a worry any longer. Use a 2 oz. green Boston round glass bottle with black glass dropper to safely store liquid extracts, essential oils and massage oil etc. Just as storing, retrieval of liquids is quite easy by means of the glass dropper included. The green glass is designed to protect the bottles contents from the effects of UV light. The glass is also durable enough to help prevent shattering if dropped.