A sleeve with a temperature indicator in or on the side wall thereof, which is visible from outside the sleeve, to convey the temperature of the contents in the container with which it is used. A method for making such a sleeve is also provided.
1. A thermally insulated container in combination with a detachable container sleeve, the combination comprising: a container body having a known thermal insulating property;the detachable container sleeve having a known thermal insulating property; anda visually observable temperature indicator affixed to the container sleeve and calibrated according to the known thermal insulating property of the container and/or the sleeve,wherein the calibrated temperature indicator is capable of determining a temperature of contents of the container to an accuracy o...
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