Dispenser comprising: - a reservoir (R) provided with a neck (C) forming at least one helical thread (T) and an upper edge (C1), - a dispensing head (D) comprising a dispensing member (P) , a pusher (B) and a fixing member (R1) engaged with the threaded neck (C) and the dispensing member (P), the fixing member (R1) comprising a skirt (11) forming a thread internal (12) which engages with the thread (T) of the neck (C), the skirt (11) extending downwards from the external periphery of an annular plate (15) which bears on the annular upper edge (C1), characterized in that the annular plate (15) is deformable, so that the skirt (11) can move axially with respect to the neck (C), while the annular plate (15) is already in contact with the upper annular edge (C1). "Figure for the abstract: figure 1"
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