A portable aeration device includes a housing having an air chamber in communication with an ambient air source, a supply area, a valve restricting airflow between the air chamber and ambient air source, and a valve restricting airflow between the chamber and supply area. The housing defines an exit in communication with the supply area, the aeration device having a cap selectively covering the housing exit. The aeration device includes a diffuser having a plurality of openings, an output tube extending from the diffuser to a location in communication with the supply area to alternately supply air from the supply area to the diffuser and allow liquid to pass from the diffuser to the supply area. A pump is in communication with the air chamber to force air from the air chamber to the supply area. The aeration device includes a fastener for attaching the housing to a water bottle.
