Abstract: Herein provided is a support plate that is configured for supporting a liquid dispenser assembly, wherein a first side of the support plate includes a lever lock system configured to attach to an air vent of a vehicle; the lever lock system including: a rod protruding from the first side of the support plate; a hook at an end of the rod remote from the support plate; a spring that is compressible along the rod towards the support plate; and a bracket member, wherein the bracket member may be moved along the rod towards and away from the support plate, between an open position wherein the spring is compressed and the bracket member is distant from the hook, and a closed position wherein the bracket member is pushed towards the hook by the spring, further provided herein is a support system that is configured for supporting a liquid dispenser assembly and includes a lock system configured to attach to a headrest of a vehicle.