A container assembly configured to maintain a predetermined humidity for storing a product therein, the container assembly comprising: a container having a body with a body wall, a bottom wall and a mouth; a cap having a top wall, the cap selectively mountable over the mouth of the container in a mounted configuration; a vertical wall comprising a lower portion of the body wall and extending substantially perpendicularly from the bottom wall, an opening edge proximate a top of the vertical wall, the opening edge defining an opening, a compartment defined between the bottom wall, the vertical wall and the opening and the opening edge being defined by a groove that extends inwardly from the body wall, the groove includes an upper rib and a lower rib; a storage cavity defined between the opening, an upper portion of the body wall, and the mouth; a moisture control material positioned within the compartment; and a compartment lid having a lid edge, a cavity surface and a compartment surface, the compartment lid connected to the opening edge with the compartment surface facing the compartment and the cavity surface facing the storage cavity in an assembled configuration, the lid edge positioned between the upper and lower ribs in the assembled configuration, wherein the compartment lid includes a perforation extending between the cavity surface and the compartment surface, characterized in that the moisture control material is comprised of a viscous liquid and configured to maintain a substantially consistent predetermined humidity or predetermined humidity range in the storage cavity, and in that the container assembly further comprises a sealing membrane having a peripheral portion, the peripheral portion secured proximate the opening edge and configured to allow water vapor or moisture flow therethrough to maintain the predetermined humidity in the storage cavity, the sealing membrane constructed of a polymeric or composite film that breathes to transport moisture vapor through the sealing membrane without leaking liquid or the viscous moisture controlling material into the storage cavity. a container having a body with a body wall, a bottom wall and a mouth; a cap having a top wall, the cap selectively mountable over the mouth of the container in a mounted configuration; a vertical wall comprising a lower portion of the body wall and extending substantially perpendicularly from the bottom wall, an opening edge proximate a top of the vertical wall, the opening edge defining an opening, a compartment defined between the bottom wall, the vertical wall and the opening and the opening edge being defined by a groove that extends inwardly from the body wall, the groove includes an upper rib and a lower rib; a storage cavity defined between the opening, an upper portion of the body wall, and the mouth; a moisture control material positioned within the compartment; and a compartment lid having a lid edge, a cavity surface and a compartment surface, the compartment lid connected to the opening edge with the compartment surface facing the compartment and the cavity surface facing the storage cavity in an assembled configuration, the lid edge positioned between the upper and lower ribs in the assembled configuration, wherein the compartment lid includes a perforation extending between the cavity surface and the compartment surface, characterized in that the moisture control material is comprised of a viscous liquid and configured to maintain a substantially consistent predetermined humidity or predetermined humidity range in the storage cavity, and in that the container assembly further comprises a sealing membrane having a peripheral portion, the peripheral portion secured proximate the opening edge and configured to allow water vapor or moisture flow therethrough to maintain the predetermined humidity in the storage cavity, the sealing membrane constructed of a polymeric or composite film that breathes to transport moisture vapor through the sealing membrane without leaking liquid or the viscous moisture controlling material into the storage cavity.