A small connecting device, usually with a small channel, intended to join a sterile water pack or a sterile isotonic sodium chloride solution pack to an inhalation therapy device (e.g., humidifier, nebulizer, oxygen therapy delivery system). It may be used when the connection is compatible (e.g., when the inhalation therapy device and the sterile liquid pack are of the same manufacture) or when incompatible (e.g., different manufacture). This is a single-use device.