A refilling assembly for use with an aerosol inhaler or electronic cigarette includes a supply reservoir containing an aerosol forming substance or aerosol precursor and a supply conduit in fluid communication with the supply reservoir for supplying the aerosol forming substance to a receiving reservoir, which is a tank in the aerosol inhaler or electronic cigarette. A return conduit is provided to receive fluid from the tank when the aerosol forming substance is supplied by the supply conduit. A protrusion or connection member is provided to achieve a sealed connection between the tank, the supply conduit and the return conduit. A displaceable member is operable to displace the aerosol forming substance from the supply reservoir, through the supply conduit, towards the receiving reservoir.
