Essential oil glass dropper bottles are small, cylindrical containers that are made of glass and are used to hold and store essential oils. Essential oils are concentrated plant extracts that are used for a variety of purposes, including aromatherapy, natural remedies, and skin care. The dropper bottle has a narrow neck and a rubber dropper top that allows the user to easily dispense small amounts of the oil by squeezing the dropper. Glass dropper bottles are preferred by some people because glass is a natural, non-porous material that does not react with essential oils or other chemicals. Glass bottles are also easy to clean and sterilize, making them a popular choice for storing essential oils. However, they may be more fragile and prone to breaking than plastic dropper bottles.