The present invention provides a cap, which includes:

    • a cap body of a plastic composition; and
    • at least one thermochromic material in contact with or admixed with the plastic composition, the thermochromic material selected such that the cap has a visually altered appearance when the cap temperature changes within a temperature range of -;25 to 85 C.; wherein the cap is adapted to be removably secured to a beverage container, the container having an opening through which a beverage in the container can be dispensed from the container, and to cover the opening of the beverage container.
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