(57) The container cap for powders, applicable to a bottle (5) provided with a mouth equipped
with a protruding lip (51) comprises (a) a housing (1) provided with a substantially
cylindrical cavity (11) whose lower extremity is closed by a detachable diaphragm
(12) and (b) a substantially cylindrical and hollow piston (3), wherein the upper
extremity (32) is closed while the lower one is in the shape of a flutemouth (31);
said housing (1) is provided with a first circular rib (13) and with an annular element
(14), whose perpendicular cross-section is in the shape of an inverted L, which extends
below and not far from said first circular rib (13) and is provided, inside, with
a second circular rib (16) so as to form a seat suitable for receiving and holding
the protruding lip (51) of said bottle (5). From the upper extremity (32) of said
piston (3) there extends an annular element (33) whose perpendicular cross-section
is also in the shape of an inverted L and is provided, inside, with a circular groove
(34) so as to form a seat suitable for receiving and holding the part of said housing
(1) which is above the annular element (14) of the same housing, said annular element
(33) of said piston being also provided with two circular weakening lines (35) which
thus define a band (36) which can be detached by tearing.
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