Abstract: An oxygen-scavenging apparatus is disclosed that can easily be applied by an end user to the bottom of a wine-bottle cork, or other food or beverage container that is sealed with a container-stopper device, such as a synthetic cork or a screw-type cap. The oxygen-scavenging apparatus is easily attachable and detachable, and relies on a friction-based fastener for its coupling to the container stopper. In some embodiments, the apparatus can serve a dual purpose by both scavenging oxygen and by absorbing moisture by using both oxygen-scavenging compound and desiccant material. The oxygen-scavenging apparatus is simple in design and thus relatively easy and cost-effective to manufacture.