The present invention relates to a cooling device (1) comprising a door (2), more than one support member (3) disposed on the inner surface of the door (2), arranged one below the other and spaced apart along the vertical direction (Y), a height adjustable shelf (4) mounted on the support members (3), a locking mechanism (5) disposed on the shelf (4), having a first position (P1) wherein the locking mechanism (5) enables the height of the shelf (4) to be fixed by interacting with the support member (3) and a second position (P2) wherein the locking mechanism (5) dislodges from the support member (3), enabling the shelf (4) to move on the support members (3) in the vertical direction (Y).