Abstract: The present invention provides a single-use, pre-packaged, sealed container (1) for use with a nebulizer device having an aerosol generator comprising a membrane, the container containing a cleaning liquid (3) and being configured to fit onto the nebulizer device, so that the container is held in place on the nebulizer device and the membrane is immersed in the liquid. The invention also provides a strip comprising a plurality of containers (10), wherein each container is detachable from the rest of the strip; a pack comprising a multi-day supply of a drug and containers; and a method for cleaning the membrane of a nebulizer device using the container.