Abstract: A mixing kit for beverages or other mixtures is disclosed. Such a kit includes a predetermined volume of a first substantially non-gaseous mixture component. The first mixture component is adapted for combination with a second liquid mixture component in a predetermined mixture ratio. A volume expandable enclosure is included for retaining the mixture components. The enclosure defines a predetermined condensed enclosure volume sufficient to retain the volume of the first mixture component, and a predetermined expanded enclosure mixture volume. The mixture volume is sufficient to retain both the first and second mixture components in the desired predetermined ratio.