Patent ID: 8511465

Claim:
Closure having a rotatable dispenser cap ( 1 ) for metering of a component into the content of a mixing vessel ( 17 ) equipped with this closure before use, which closure comprises a separately filled folding container ( 3 ), which is below held by resilient spacer elements ( 7 ) above at least one stationary piercing tooth ( 8 ), and, by turning the rotatable dispenser cap ( 1 ) and screwing downward a press ring ( 2 ), said folding container ( 3 ) is being pressed onto the at least one piercing tooth ( 8 ) and by this pierced open, and hence by further screwing down of the press ring ( 2 ), the folding container ( 3 ) is being squeezed and pressed out, whereby its content is moved into the underlying mixing vessel ( 17 ).