Patent attributes
A cap for a reusable bottle and a compound-containing container is provided. The container is a separate, replaceable structure with a base (well/bowl) section containing the compound and a hinged or otherwise removable cap. The container is secured in a cavity in the top of the cap using appropriate detents that flex based upon the materials inherent resilient (e.g. a polymer material) to selectively engage with and disengage from the cap cavity. The cap can include a (unitary or integral) hook or ring that extends from the edges of the cap and can provide a stop that the lid of the secured container hinges against when placed in an open position. The hinge includes a detent adjacent to its front edge (opposite the side containing the hinge. This detent retains the lid in a closed position, but can be overcome by pressure applied by the user to open the lid.