The invention relates to a draining device comprising an outer container (1) which receives a perforated inner receptacle (2), wherein the outer container (1) can support the perforated inner receptacle (2) in a low position and in a high position, the perforated inner receptacle (2) having at least two external side protuberances (22) which can lie on support members (16) of the outer container (1) when the perforated inner receptacle (2) is in the high position. According to the invention, the outer container (1) has an upper opening (17) which makes, inside said outer container (1), at least two side reinforcements (12) between said support members (16), said side reinforcements (12) being designed to at least partially house said external side protuberances (22) when the perforated inner receptacle (2) is in the low position.
