A carrier, and method of using the carrier, for use in a vaping smoking substitute device. The carrier including a substrate enclosing a plant material, wherein the substrate comprises a nicotinic compound, and wherein the substrate is configured to release the nicotinic compound into an aerosol-former liquid upon immersion in the aerosol-former liquid. The method of using the carrier including combining the carrier with an aerosol-former liquid； and allowing the nicotinic compound to disperse in the aerosol-former liquid.
