A system for dispensing a personal care fluid, the system comprising: a) a dispenser comprising: a dispenser body (1100, 3100) comprising a refill cavity (1130, 3130) having a top end (1140, 3140); a dispenser lid; and a pump sub-system mounted to the dispenser lid, the pump sub-system comprising a first dip tube, a dispensing orifice, and a pump; b) a refill cartridge (2000, 4000) configured for slidable insertion and removal from the refill cavity (1130, 3130) via the top end (1140, 3140) of the refill cavity (1130, 3130), the refill cartridge comprising: a cartridge body (2100, 4100) comprising a fluid cavity (2130, 4130); a store of the personal care fluid in the fluid cavity (2130, 4130); and a second dip tube (2500, 4500) extending into the store of the personal care fluid; the dispenser lid configured to be alterable between: a first state in which the top end (1140, 3140) of the refill cavity (1130, 3130) is open so that the refill cartridge (2000, 4000) can be slid into the refill cavity (1130, 3130); and a second state in which the dispenser lid is coupled to the dispenser body (1100, 3100) to enclose the top end (1140, 3140) of the refill cavity (1130, 3130) and the second dip tube (2500, 4500) is operably mated with the first dip tube so that the store of the personal care fluid can be dispensed from the dispensing orifice upon actuation of the pump, wherein the dispenser body (1100, 3100) comprises one or more protuberances (1200, 3200) extending inward from an inner surface (1120, 3120) of the dispenser body (1100, 3100) that defines the refill cavity (1130, 3130); and wherein the cartridge body (2100, 4100) comprises one or more depressions (2170, 4170) that receive the one or more protuberances (1200, 3200) when the refill cartridge (2000, 4000) is positioned within the refill cavity (1130, 3130). a) a dispenser comprising: a dispenser body (1100, 3100) comprising a refill cavity (1130, 3130) having a top end (1140, 3140); a dispenser lid; and a pump sub-system mounted to the dispenser lid, the pump sub-system comprising a first dip tube, a dispensing orifice, and a pump; a dispenser body (1100, 3100) comprising a refill cavity (1130, 3130) having a top end (1140, 3140); a dispenser lid; and a pump sub-system mounted to the dispenser lid, the pump sub-system comprising a first dip tube, a dispensing orifice, and a pump; b) a refill cartridge (2000, 4000) configured for slidable insertion and removal from the refill cavity (1130, 3130) via the top end (1140, 3140) of the refill cavity (1130, 3130), the refill cartridge comprising: a cartridge body (2100, 4100) comprising a fluid cavity (2130, 4130); a store of the personal care fluid in the fluid cavity (2130, 4130); and a second dip tube (2500, 4500) extending into the store of the personal care fluid; the dispenser lid configured to be alterable between: a first state in which the top end (1140, 3140) of the refill cavity (1130, 3130) is open so that the refill cartridge (2000, 4000) can be slid into the refill cavity (1130, 3130); and a second state in which the dispenser lid is coupled to the dispenser body (1100, 3100) to enclose the top end (1140, 3140) of the refill cavity (1130, 3130) and the second dip tube (2500, 4500) is operably mated with the first dip tube so that the store of the personal care fluid can be dispensed from the dispensing orifice upon actuation of the pump, wherein the dispenser body (1100, 3100) comprises one or more protuberances (1200, 3200) extending inward from an inner surface (1120, 3120) of the dispenser body (1100, 3100) that defines the refill cavity (1130, 3130); and wherein the cartridge body (2100, 4100) comprises one or more depressions (2170, 4170) that receive the one or more protuberances (1200, 3200) when the refill cartridge (2000, 4000) is positioned within the refill cavity (1130, 3130). a cartridge body (2100, 4100) comprising a fluid cavity (2130, 4130); a store of the personal care fluid in the fluid cavity (2130, 4130); and a second dip tube (2500, 4500) extending into the store of the personal care fluid; the dispenser lid configured to be alterable between: a first state in which the top end (1140, 3140) of the refill cavity (1130, 3130) is open so that the refill cartridge (2000, 4000) can be slid into the refill cavity (1130, 3130); and a second state in which the dispenser lid is coupled to the dispenser body (1100, 3100) to enclose the top end (1140, 3140) of the refill cavity (1130, 3130) and the second dip tube (2500, 4500) is operably mated with the first dip tube so that the store of the personal care fluid can be dispensed from the dispensing orifice upon actuation of the pump, wherein the dispenser body (1100, 3100) comprises one or more protuberances (1200, 3200) extending inward from an inner surface (1120, 3120) of the dispenser body (1100, 3100) that defines the refill cavity (1130, 3130); and wherein the cartridge body (2100, 4100) comprises one or more depressions (2170, 4170) that receive the one or more protuberances (1200, 3200) when the refill cartridge (2000, 4000) is positioned within the refill cavity (1130, 3130).