Attachment for a beverage container

An attachment for a beverage container, the attachment comprising:

• a cap configured to attach to an opening in the beverage container, the cap comprising an opening;
• a tube passing through the cap, wherein the opening in the cap is located proximate to a first end of the tube, and a second end of the tube is configured to be located within the beverage container when the cap is attached to the beverage container, such that a beverage contained in the beverage container flows through the tube and out of the opening in the cap;
• a container attached to the tube;
• a liquid in the container, the liquid comprising a tastant, the container comprising an opening to allow the liquid to flow from the container into the tube and out of the opening in the cap;
• a restrictor between the opening of the container and the tube and configured to have at least one function selected from the group consisting of controlling and restricting the flow of the liquid from the container into the tube, the restrictor and the tube configured such that the liquid begins to exit the opening in the cap before the beverage begins to exit the opening in the cap;
• and
• a non-return valve within the tube and configured to control and/or restrict the flow of the beverage through the tube and out of the opening in the cap,
• the cap further comprises a screw thread on an interior face of the cap at an opposite end of the cap from the opening in the cap, and the container is positioned between (i) the screw thread and (ii) the opening in the cap that is proximate to the first end of the tube,
• wherein the liquid and the beverage are different portions of a final beverage.