The present invention relates to a dispensing device comprising: —a container (2) for holding a liquid having an opening, and—a dispensing assembly (4) mountable on or in said opening, said dispensing assembly comprising: —a pump (5) having a pump chamber (7) and a pump inlet (6) comprising an inlet valve (9) and a pump outlet (8) comprising an outlet valve (10), and—a liquid supply channel (16), one end of said channel (16) being in fluid communication with said inlet (6), the other end being arranged in a bottom portion of said container (2), wherein a one-way valve (20) is arranged in said channel (16), and wherein an air inlet opening (17) is provided between said inlet valve (9) and said one-way valve.