A cartridge is provided for use with an apparatus for generating an inhalable medium. The cartridge has a container for holding a liquid and a receptacle for receiving a solid material. A shell is provided around the outside of the liquid container. A channel is defined between the liquid container and the shell. Liquid exiting the container can flow, in the form of at least one of a vapor and an aerosol, through the channel to the receptacle and through solid material received by the receptacle in use.