A cartridge for a vaporizer device, the cartridge comprising: a reservoir housing having a first housing end and a second housing end opposite the first housing end, the reservoir housing being configured to hold vaporizable material; an airflow tube that extends through the reservoir housing, the airflow tube defining an airflow passageway therethrough; first and second seals (214, 216) that are each substantially impermeable to fluid, the first seal being substantially secured to the first housing end and the second seal being substantially secured to the second housing end, wherein the first and second seals (214, 216) are configured to be selectively compromised to allow access to the vaporizable material within the reservoir housing for vaporization into vaporized material; and characterised in that the cartridge further comprises: a mouthpiece defining a hollow body, the hollow body including a first body end and a second body end opposing the first body end, the first body end including an orifice extending therethrough and the second body end being configured to receive the first housing end; a hollow pin extending distally from the first body end and in communication with the orifice, wherein the mouthpiece and the reservoir housing are configured to selectively slide relative to each other to cause the hollow pin to pierce the first seal to thereby place the orifice in communication with the airflow passageway; and a first locking mechanism configured to lock the mouthpiece to the reservoir housing to prevent sliding of the mouthpiece and the reservoir housing relative to each other until application of a compressive force to at least one of the mouthpiece and the reservoir housing exceeds a predetermined threshold force. a reservoir housing having a first housing end and a second housing end opposite the first housing end, the reservoir housing being configured to hold vaporizable material; an airflow tube that extends through the reservoir housing, the airflow tube defining an airflow passageway therethrough; first and second seals (214, 216) that are each substantially impermeable to fluid, the first seal being substantially secured to the first housing end and the second seal being substantially secured to the second housing end, wherein the first and second seals (214, 216) are configured to be selectively compromised to allow access to the vaporizable material within the reservoir housing for vaporization into vaporized material; and characterised in that the cartridge further comprises: a mouthpiece defining a hollow body, the hollow body including a first body end and a second body end opposing the first body end, the first body end including an orifice extending therethrough and the second body end being configured to receive the first housing end; a hollow pin extending distally from the first body end and in communication with the orifice, wherein the mouthpiece and the reservoir housing are configured to selectively slide relative to each other to cause the hollow pin to pierce the first seal to thereby place the orifice in communication with the airflow passageway; and a first locking mechanism configured to lock the mouthpiece to the reservoir housing to prevent sliding of the mouthpiece and the reservoir housing relative to each other until application of a compressive force to at least one of the mouthpiece and the reservoir housing exceeds a predetermined threshold force. a mouthpiece defining a hollow body, the hollow body including a first body end and a second body end opposing the first body end, the first body end including an orifice extending therethrough and the second body end being configured to receive the first housing end; a hollow pin extending distally from the first body end and in communication with the orifice, wherein the mouthpiece and the reservoir housing are configured to selectively slide relative to each other to cause the hollow pin to pierce the first seal to thereby place the orifice in communication with the airflow passageway; and a first locking mechanism configured to lock the mouthpiece to the reservoir housing to prevent sliding of the mouthpiece and the reservoir housing relative to each other until application of a compressive force to at least one of the mouthpiece and the reservoir housing exceeds a predetermined threshold force.