Abstract: A pourer attachment that is selectively engageable with a bottle is provided for pouring and mixing a base liquid (e.g., liquor) and a secondary liquid (e.g., hydration concentration). The pourer includes a neck section and a base section. The base section includes a reservoir for containing the secondary liquid and is in fluid communication with a secondary liquid channel of the neck section through which the secondary liquid may be poured when a lid associated with the pourer is open. An aperture in the lid allows the base liquid to be poured when the lid is in a closed position. As such, when the lid is in its open position, both the secondary liquid and base liquid may be poured and mixed, and when the lid is in its closed position, only the base liquid may be poured.