A multi-part aerosol-generating assembly system has a mouth end and a distal end, and includes a first part having a housing and a power supply disposed in the housing. The system also includes a second part releasably connectable with the first part. The second part includes a heating element and a liquid transfer element. The heating element is operably coupled to the power supply when the second part is connected with the first part. The system further includes a third part releasably connectable with the second part. The third part includes a reservoir containing a liquid aerosol generating substrate. The liquid aerosol generating substrate is in fluid communication with the liquid transfer element when the third part is connected with the second part. The system further includes a cover disposable over the third part. The cover is releasably securable in a position relative to the third part.