Multi-chamber mist generator for generating mist including nicotine

A mist generator for generating a mist for inhalation by a user, the mist generator comprising:

• an air inlet port;
• a mouthpiece including a mist outlet port;
• an air flow path from the air inlet port to the mist outlet port;
• a first liquid chamber containing a first liquid including nicotine;
• a second liquid chamber containing a second liquid;
• a first ultrasonic transducer including a first atomisation surface;
• a second ultrasonic transducer including a second atomisation surface;
• a transducer holder including a holder surface that is provided with a first recess and a second recess, wherein the first recess retains the first ultrasonic transducer with the first atomisation surface generally in a plane with the holder surface and the second recess retains the second ultrasonic transducer with the second atomisation surface generally in the plane with the holder surface;
• a first capillary which is absorbent, at least part of the first capillary being generally parallel with the plane and extending along the holder surface from the first liquid chamber to the first ultrasonic transducer, one part of the first capillary being superimposed on the holder surface and another part of the first capillary being in contact with at least a portion of the first atomisation surface, wherein the first capillary transports the first liquid by capillary action from the first liquid chamber to the first atomisation surface;
• and
• a second capillary which is absorbent, at least part of the second capillary being generally parallel with the plane and extending along the holder surface from the second liquid chamber to the second ultrasonic transducer, one part of the second capillary being superimposed on the holder surface and another part of the second capillary being in contact with at least a portion of the second atomisation surface, wherein the second capillary transports the second liquid by capillary action from the second liquid chamber to the second atomisation surface,
• the first ultrasonic transducer being configured to generate and transmit ultrasonic waves to generate a first portion of the mist from the first liquid at the interface between the first capillary and the first ultrasonic transducer, and
• the second ultrasonic transducer being configured to generate and transmit ultrasonic waves to generate a second portion of the mist from the second liquid at the interface between the second capillary and the second ultrasonic transducer, wherein the first portion of the mist and the second portion of the mist combine and flow out through the mist outlet port to the user when the user draws on the mouthpiece.