the yin  yang  bottle from measom freer is uniquely shaped for high impact shelf appeal with two bottles fitting perfectly together just like yin and yang.with 2 bottles fitting perfectly together, yin yang bottle is intended for duo products such as shampoo and conditioner, hair  & toiletry, cosmetic and two part products.manufactured in the uk in natural hdpe with colours available to order.featuring 28 mm r4 neck size, bottle will fit fine ribbed caps, flip caps, disc caps, and lotion pumps. easy grip shape makes it suitable for wide range of product sectors.