Apparatus for generating an inhalable medium

1. An apparatus for generating an inhalable medium, the apparatus comprising:

a container for holding a liquid;

an outer shell;

an annular channel between the container and the outer shell;

a heater for volatilizing liquid held in the container to generate a flow of at least one of a vapor or an aerosol in use; and

an annular receptacle for receiving material;

wherein the annular receptacle is located adjacent to and completely surrounds the heater such that in use, material received in the annular receptacle is heated by the heater, and wherein one or more constituents of material received in the annular receptacle in use are mixed with the flow of at least one of the vapor or the aerosol in use to produce the inhalable medium; and

wherein the apparatus is arranged such that in use, the flow of at least one of the vapor or the aerosol passes radially out through the material received in the annular receptacle from the heater to the annular channel, thereby to entrain the one or more constituents of material in the flow of at least one of the vapor or the aerosol.

2. The apparatus according to claim 1 , wherein the liquid container and the annular receptacle are an integral unit.

3. The apparatus according to claim 1 , wherein the annular receptacle comprises two or more discrete receiving portions each for receiving a respective discrete portion of the material.

4. The apparatus according to claim 1 , wherein the container is removable from the apparatus.

5. The apparatus according to claim 1 , wherein the annular receptacle comprises one or more retainers for retaining material within the annular receptacle in use.

6. The apparatus according to claim 5 , wherein the one or more retainers allow the at least one of the vapor or the aerosol to pass there-through, and prevent material received in the annular receptacle in use to pass there through.

7. The apparatus according to claim 1 , wherein the annular receptacle has material received therein.

8. The apparatus according to claim 7 , wherein the material is annular in shape.

9. The apparatus according to claim 7 , wherein the material comprises a recess into which the heater is at least partially inserted.

10. The apparatus according to claim 7 , wherein the material is contained in a self-supporting material container.

11. The apparatus according to claim 7 , wherein the material is material in solid form.

12. The apparatus according to claim 11 , wherein the solid material is or comprises a flavored material.

13. A method of generating an inhalable medium using an apparatus comprising a container for holding a liquid, an outer shell, an annular channel between the container and the outer shell, a heater for volatizing the liquid, and an annular receptacle for receiving material adjacent to and completely surrounding the heater, the method comprising:

volatizing, using the heater, liquid held in the container to generate a flow of at least one of a vapor or an aerosol;

heating, using the heater, material received in the annular receptacle; and

passing the flow of at least one of the vapor or the aerosol radially out through the material received in the annular receptacle from the heater to the annular channel to mix one or more constituents of the material with the flow of at least one of the vapor or the aerosol by entraining the one or more constituents of the material in the flow of at least one of the vapor or the aerosol to produce the inhalable medium.

14. A cartridge for use with an apparatus for generating an inhalable medium, the cartridge comprising:

a container for holding a liquid;

an outer shell;

an annular channel between the container and the outer shell;

a heater for volatizing liquid held in the container to generate a flow of at least one of a vapor or an aerosol in use; and

an annular receptacle for receiving material;

wherein the annular receptacle is located adjacent to and completely surrounds the heater such that in use, material received in the annular receptacle is heated by the heater, and wherein one or more constituents of material received in the annular receptacle from the heater to the annular channel are mixed with the flow of at least one of the vapor or the aerosol in use to produce the inhalable medium; and

wherein the cartridge is arranged such that in use, the flow of at least one of the vapor or the aerosol passes radially out through the material received in the annular receptacle, thereby to entrain the one or more constituents of the material in the flow of at least one of the vapor or the aerosol.