An inhalation device to hold an inhalant-generating component to generate an inhalant to be drawn through the device and inhaled by a user. The device has a body (10) having a first open end (11b) configured to receive an inhalant-generating component and, a second open end (11a) in fluid communication with the first end through which a user may draw inhalant from the inhalant-generating component. The body is configured to receive a flavour delivery component (63) having an organoleptic material to selectively allow or prevent addition of an organoleptic additive into an inhalant stream drawn through the device. The device includes a ventilation control mechanism (15) configured to selectively allow different amounts of ambient air into the body to mix with and dilute the inhalant stream as it is drawn through the device in use.