A tamper-evident closure comprising a rfid tag

A tamper-evident closure for a container neck, the tamper-evident closure comprising:

• a first portion, and
• a second portion comprising a window through which a view of the first portion is visible;
• the second portion rotatable relative to the first portion upon first opening of the tamper-evident closure, in a first direction of rotation, from a first position in which the first and second portions are in a first relative relation to a second position in which the first and second portions are in a second relative relation;
• and
• a locking mechanism for irreversibly locking the first and second portions in the second relative relation;
• rotation of the second portion relative to the first portion causes rotation of the window relative to the first portion,
• a first view of the first portion is visible through the window when the first and second portions are in the first relative relation, and
• a second, different view of the first portion is visible through the window when the first and second portions are in the second relative relation;
• wherein the tamper-evident closure further comprises an RFID device associated with the first portion,
• the RFID device is aligned with the window of the second portion when the first and second portions are in the first relative relation and is readable, and
• the RFID device is masked by the second portion when the first and second portions are in the second relative relation and is not readable;
• whereby the readability of the RFID device is irreversibly blocked during first opening of the tamper-evident closure.