There is disclosed a sealed container of the disposable type and having a container body (1) made of cardboard, paper or the like and internally lined with waterproof material, and a closure member (4) which hermetically seals one end of the container body, in which:
the closure member (4) includes a panel (7) which closes the open end (5) of the body (1), and a peripheral flange (6) which overlies and which is secured to the open end region (1a) of the body; a covering (8,12) is provided on an exposed end face (1 b) of the body; a reinforcing member (9) is secured to a peripheral area of the end region (1a) of the body; and the peripheral flange (6) is secured to the end region (1a) of the body at a position corresponding to the position of securement of the reinforcing member (9).