Abstract: A constituent delivery vial and method employs a sealed vial portion which employs an inner lid to keep a first constituent, suitably a liquid, separate from a second constituent. The second constituent is contained within a capsule wherein the capsule is maintained within a chamber between the first lid and an outer top lid. The constituents are mixed by depressing the top lid to cause the capsule to penetrate the bottom lid and either directly release the constituent containers in the capsule to the constituent contained below the lower lid or, in the case of a dissolving capsule, to allow combining of the two once the capsule dissolves. The bottom of the cup includes a syringe well which slopes downwardly to provide a central lowest point to the cup to enable use of a syringe for retrieval of as much of the mixed constituents as possible. Another embodiment of the constituent delivery vial and method includes use of a third lid that is in sealed relationship and covers the outer top lid.