Refillable liquid dispensing device

A refillable underarm deodorant dispensing system, comprising:

• a dispenser comprising:
• a housing defining a first reservoir therein configured to contain a fluid;
• an applicator coupled with the housing, such that at least a portion of the applicator is configured to rotate relative to the housing, the applicator being configured to receive the fluid from the first reservoir;
• a first check valve extending through a wall of the housing and communicating with the first reservoir, wherein the first check valve comprises a resilient body defining a first conduit extending therein, the first conduit having an open end communicating with an exterior of the housing and a sealing end communicating with the first reservoir, wherein the sealing end is biased toward a closed configuration in which fluid is prevented from traversing the first conduit;
• and
• a refill cartridge comprising:
• a second housing defining a second reservoir therein, wherein the second housing comprises a flexible pouch, wherein the refill cartridge comprises a second check valve to retain fluid in the second reservoir until the fluid in the second reservoir is at a predetermined pressure;
• and
• a valve-piercing element extending from the second housing, the valve-piercing element comprising a proximal end coupled with the second housing, a distal end, and an elongate body extending between the proximal end and the distal end, the elongate body defining a second conduit therethrough and an opening positioned on or near the distal end, the opening being in communication with the second reservoir via the second conduit,
• wherein the elongate body of the valve-piercing element is configured to be received through the first conduit of the resilient body of the first check valve to open the sealing end of the first check valve, such that, when the elongate body is received through the first conduit of the resilient body of the first check valve, the second reservoir of the refill cartridge fluidly communicates with the first reservoir of the dispenser via the second conduit of the elongate body of the valve-piercing element.