Use of a substantially moisture tight container and cap assembly for storing and packaging drug delivery strips or diagnostic test strips, the assembly comprising a container and a cap, wherein the container has a container base, a sidewall depending upwardly from the base, and a top container surface extending inward from the sidewall, the top container surface is provided with an opening that permits access to an interior of the container, the opening being bound by a lip extending upwards from the top container surface, wherein the container contains a desiccant, wherein the cap has a base portion with an outer periphery that extends over at least a portion of the container, the cap being provided with a skirt that extends downwardly therefrom and being positioned at a location on the cap that allows the skirt to enter into a closing relationship with the lip in which the skirt fits over a periphery of the lip, wherein an inwardly facing extension that extends around the interior periphery of the skirt is provided at a distal end of the skirt, and the lip is provided with a distal end whereby an outwardly facing extension extends around the periphery of the lip distal end, wherein the inwardly facing extension and the outwardly facing extension are adapted to abut and interlock with each other, wherein the cap further includes a lip seal member that extends downwardly therefrom, extends around the inside of the cap and is configured to abut at least a portion of the interior side of the lip when the cap is in a closed position so as to provide a sealing position, in addition to the closing relationship between the skirt and the lip, and wherein a moisture tight seal between the cap and the container is formed by the lip seal member and the lip. wherein the container has a container base, a sidewall depending upwardly from the base, and a top container surface extending inward from the sidewall, the top container surface is provided with an opening that permits access to an interior of the container, the opening being bound by a lip extending upwards from the top container surface, wherein the container contains a desiccant, wherein the cap has a base portion with an outer periphery that extends over at least a portion of the container, the cap being provided with a skirt that extends downwardly therefrom and being positioned at a location on the cap that allows the skirt to enter into a closing relationship with the lip in which the skirt fits over a periphery of the lip, wherein an inwardly facing extension that extends around the interior periphery of the skirt is provided at a distal end of the skirt, and the lip is provided with a distal end whereby an outwardly facing extension extends around the periphery of the lip distal end, wherein the inwardly facing extension and the outwardly facing extension are adapted to abut and interlock with each other, wherein the cap further includes a lip seal member that extends downwardly therefrom, extends around the inside of the cap and is configured to abut at least a portion of the interior side of the lip when the cap is in a closed position so as to provide a sealing position, in addition to the closing relationship between the skirt and the lip, and wherein a moisture tight seal between the cap and the container is formed by the lip seal member and the lip.