An apparatus and method for storing, mixing, and delivering a powder solid and a fluid such as baby formula and water without the risk of product contamination or product expulsion to the surrounding environment. The apparatus is used by placing the powder formula into a specially designed compartment, joining the compartment with another compartment configured to store a liquid, filling the second compartment with a liquid, and sealing the system together. Once mixing and activation is completed, the two compartments are twisted in relation to one another, and the two separate substances are now allowed to flow freely and mix. The product can now be served to the child.