Abstract: The device according to the invention comprises a receptacle 1 having a side wall 2 with facing wall portions thereof being at different distances apart and delimiting an internal periphery of the receptacle, the device is characterized in that it further comprises a platform 8 including a perforated bottom 9 and having an external periphery which fits inside the internal periphery of the receptacle and which has portions that are complementary thereto, and in that the platform includes lifting means 16.