Abstract: According to one specific embodiment, an oxygen humidifier includes a container that defines an interior space. The oxygen humidifier also includes a top portion that is permanently coupled to the container. The top portion includes an opening for accessing the interior space of the container. The humidifier further includes a lid portion that is movably coupled to the top portion. The lid portion is configured to move between a closed configuration and an open configuration. In the closed configuration, the lid portion seals the opening, and in the open configuration, the lid portion allows access to the interior space through the opening. The oxygen humidifier additionally includes an oxygen diffuser positioned within the interior space.