Electronic Cigarette With Optimised Vaporisation

A capsule for an electronic cigarette, the capsule having a first end for engaging with an electronic cigarette device and a second end configured as a mouthpiece portion having a vapor outlet, the capsule further comprising:

• a liquid store configured to contain a liquid to be vaporized,
• a vaporizing unit comprising a heater and a fluid transfer element, the vaporizing unit being arranged within a vaporizing chamber,
• a main vapor channel extending from the vaporizing chamber to the vapor outlet in the mouthpiece portion, and
• a housing comprising an inner housing and an outer housing, the housing enclosing the liquid store and the vaporizing unit,
• wherein the inner housing comprises a first shoulder and a second shoulder which define a circular groove there-between, wherein the outer housing comprises a projection configured to extend into the circular groove when the inner housing and the outer housing are assembled together, wherein the liquid store is located in a void in-between the inner housing and the outer housing, wherein a seal is provided inside the circular groove between the inner housing and the outer housing, and wherein the seal has a cross-sectional shape having a cross-sectional height that is larger than a cross-sectional width thereof.