A cartridge (100, 200) for use with a liquid diffusing device, the cartridge (100, 200) comprising: a cartridge housing (110a, 110b, 210a, 210b) defining an internal housing cavity (113, 213) partially filled with a liquid to be diffused; a diffusion head (140, 240) positioned within the internal housing cavity (113, 213), the diffusion head (140, 240) including a venturi device (147, 247) for generating a diffused liquid from the liquid contained in the internal housing cavity (113, 213); and an insert (170, 270) positioned downstream of the diffusion head (140, 240), the insert (170, 270) including an inlet (172, 272) to receive the diffused liquid generated by the venturi device (147, 247), an outlet zone (114, 214) through which to discharge the diffused liquid toward an external environment, and a tortuous passage (176, 276) extending between the inlet (172, 272) and the outlet zone (114, 214), characterized in that the cartridge (100, 200) is configured to be operated in an upright configuration in which a central axis of the cartridge housing (110a, 110b, 210a, 210b) is oriented in a vertical direction from a bottom end of the cartridge (100, 200) to a top end of the cartridge (100, 200), the tortuous passage (176, 276) is at least partially defined by a vertical sidewall of the insert (170, 270) that extends from a floor (179, 279) of the insert (170, 270) toward the top end of cartridge (100, 200), and the tortuous passage (176, 276) follows a non-linear path that assists in preventing liquid from leaking from the cartridge (100, 200) when the cartridge (100, 200) is upended from the upright configuration to an upended configuration such as when the cartridge (100, 200) is oriented sideways or upside down. a cartridge housing (110a, 110b, 210a, 210b) defining an internal housing cavity (113, 213) partially filled with a liquid to be diffused; a diffusion head (140, 240) positioned within the internal housing cavity (113, 213), the diffusion head (140, 240) including a venturi device (147, 247) for generating a diffused liquid from the liquid contained in the internal housing cavity (113, 213); and an insert (170, 270) positioned downstream of the diffusion head (140, 240), the insert (170, 270) including an inlet (172, 272) to receive the diffused liquid generated by the venturi device (147, 247), an outlet zone (114, 214) through which to discharge the diffused liquid toward an external environment, and a tortuous passage (176, 276) extending between the inlet (172, 272) and the outlet zone (114, 214), characterized in that the cartridge (100, 200) is configured to be operated in an upright configuration in which a central axis of the cartridge housing (110a, 110b, 210a, 210b) is oriented in a vertical direction from a bottom end of the cartridge (100, 200) to a top end of the cartridge (100, 200), the tortuous passage (176, 276) is at least partially defined by a vertical sidewall of the insert (170, 270) that extends from a floor (179, 279) of the insert (170, 270) toward the top end of cartridge (100, 200), and the tortuous passage (176, 276) follows a non-linear path that assists in preventing liquid from leaking from the cartridge (100, 200) when the cartridge (100, 200) is upended from the upright configuration to an upended configuration such as when the cartridge (100, 200) is oriented sideways or upside down.