Smart Lid
The ‘Smart Lid’ is a special disposable lid that indicates when a drink is too hot to drink. The Smart Lid slowly changes from a red color into a dark red color when the drink cools, so it is the right temperature to drink (under 48 Celsius degrees). The lid prevents people from burning their mouth and hands to the drink. Very useful for restaurants and cafés that sell take-away beverages.
Bron: PSFK
Website: Smart Lid
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