A vaporizer cartridge system includes a vaporizer assembly containing a heating element, a mouthpiece that is selectively attachable with the vaporizer assembly, a battery assembly that is selectively attachable with the vaporizer assembly, and a cartridge configured to store liquid in a reservoir, the cartridge being selectively attachable with the vaporizer assembly such that liquid stored within the reservoir is in fluid communication with the vaporizer assembly. The vaporizer cartridge system is configured such that when the cartridge and the mouthpiece are attached to the vaporizer assembly, the cartridge fits within the mouthpiece.