| 摘要 |
a lid (3), an aperture (4) provided through said lid (3) for the filling of the jug (1), a blocking mechanism (5) mounted on the lid (3) at the aperture (4) and displaceable between a first position, in which it closes said aperture, and a second, open position, actuating means associated with said blocking mechanism (5) for urging it into said first position and such as to allow its passage into the second position under the action of the flow of liquid admitted into the jug (1) through the aperture (4), a counting device (11), on said lid (3), for counting the cycles of opening and/or closure of said blocking means (5) as a result of the admission of liquid into said jug (1).
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