Abstract: Various embodiments of containers are described having a base and a cap that is configured to couple with the base. The base includes a housing having a hollow interior, with the housing extending upwardly from an upper surface of the base. The base also includes a set of flexible tabs that are configured to flex when a force is applied. The housing has a set of outward projections, each of which is configured to be inserted into a recessed portion or notch of the cap when the cap is coupled with the base. The cap further includes a set of downward projections that contact the flexible tabs, such that a downward force applied to the cap causes the flexible tabs to flex downwardly, and the projections of the housing to move within the first and second recessed portions.

Abstract: A mechanism or feature incorporated into or on the lid of a one piece child-resistant container which allows customization of the container by attachment of an independent, separate ancillary piece or identifier cap to the lid. The identifier cap may snap onto or be pushed onto the lid in a secure manner.