Reservoir and heater system for controllable delivery of multiple aerosolizable materials in an electronic smoking article

A smoking article comprising:

• a mouthend comprising an opening;
• an air passage through at least a portion of the smoking article and terminating at the opening;
• a first reservoir containing a first aerosol precursor composition component;
• a second reservoir comprising a second aerosol precursor composition component;
• an aerosolization zone in which the first aerosol precursor composition component and the second aerosol precursor composition component are aerosolized, the aerosolization zone being in fluid communication with the air passage;
• a first transport element providing fluid communication between the first reservoir and the aerosolization zone;
• a second transport element separate from the first transport element providing fluid communication between the second reservoir and the aerosolization zone;
• wherein the first aerosol precursor composition component and the second aerosol precursor composition component remain substantially separated until combination in the aerosolization zone;
• wherein the transportation of the first aerosol precursor composition components and the seconds aerosol precursor composition component to the aerosolization zone is normalized such that a rate of transport of the first aerosol precursor composition component differs from a rate of transport of the second aerosol precursor composition component by less than a threshold amount, wherein the threshold amount is about 15%;
• and
• wherein the first aerosol precursor composition component and the second aerosol precursor composition component are aerosolized in the aerosolization zone when a user draws on the smoking article.