The receptacle (1) is in the form of a closed hollow body (2) including a side wall (2a) and two end walls, one of which (2b) called the 'emptying' wall, is designed to be opened in order subsequently to empty the receptacle. The hollow body (2) includes, in its other end wall (2c), an orifice (3) for filling the hollow body; the receptacle also includes means for closing said orifice (3), e.g. in the form of a removable cap (7). The receptacle includes an add-on hollow part (8) for containing a gas under pressure and designed to be fixed through the filling wall (2c) of the hollow body (2), being inserted into the hollow body via the filling orifice (3) in said wall, and including one or more escape openings (8b) making it possible, once the hollow part has been fixed through the filling wall (2c) to put the inside of the hollow part (8) into communication with the inside of the hollow body (2).
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