A holder (404, 504, 604) and a removable and replaceable cartridge, the cartridge comprising: a heat source, a substrate portion, and an outer housing configured to circumscribe at least a portion of the heat source and the substrate portion, the holder comprising: a receiving end and a mouth end opposite the receiving end, the holder defining a socket (434, 534, 634) configured to receive a proximal section of the cartridge, the holder having a lighting configuration in which the holder is configured to secure a proximal section of the cartridge within the socket with the heat source of the cartridge opposite the proximal section disposed beyond the receiving end of the holder, the holder also having a received configuration in which the holder is configured to secure the proximal section of the cartridge in the socket with the heat source disposed proximate the receiving end of the holder, and wherein the receiving end comprises a solid peripheral wall, further comprising a mouthpiece (412, 512, 612) defining a portion of a bore (414, 514, 614), a main body portion (410, 510, 610) defining a chamber (416, 516, 616), and a sleeve (430, 530, 630) slidably disposed within the chamber, the sleeve including fingers (436, 536, 636) extending towards the receiving end, the fingers defining the socket therebetween, the fingers having an expanded configuration in which the socket is configured to accept a proximal section of a cartridge and a compressed configuration in which the fingers are configured to engage the proximal section of the cartridge to secure the cartridge to the holder, whereby the fingers are movable between the expanded configuration and the compressed configuration by relative movement of the sleeve and chamber, wherein the main body portion includes an inner barrel (420, 520, 620) forming a distal section thereof. a receiving end and a mouth end opposite the receiving end, the holder defining a socket (434, 534, 634) configured to receive a proximal section of the cartridge, the holder having a lighting configuration in which the holder is configured to secure a proximal section of the cartridge within the socket with the heat source of the cartridge opposite the proximal section disposed beyond the receiving end of the holder, the holder also having a received configuration in which the holder is configured to secure the proximal section of the cartridge in the socket with the heat source disposed proximate the receiving end of the holder, and wherein the receiving end comprises a solid peripheral wall, further comprising a mouthpiece (412, 512, 612) defining a portion of a bore (414, 514, 614), a main body portion (410, 510, 610) defining a chamber (416, 516, 616), and a sleeve (430, 530, 630) slidably disposed within the chamber, the sleeve including fingers (436, 536, 636) extending towards the receiving end, the fingers defining the socket therebetween, the fingers having an expanded configuration in which the socket is configured to accept a proximal section of a cartridge and a compressed configuration in which the fingers are configured to engage the proximal section of the cartridge to secure the cartridge to the holder, whereby the fingers are movable between the expanded configuration and the compressed configuration by relative movement of the sleeve and chamber, wherein the main body portion includes an inner barrel (420, 520, 620) forming a distal section thereof.