Their evolution is in fact a fascinating case study of how DIY user interaction can affect, even initiate, the design of a product. Photography: Benjamin English/Princeton Architectural Press In his ...

Overheating Protection: When hot coffee is sealed within a cup, the heat can cause the plastic lid to warm up excessively.

The lid's design prevented coffee from splashing ... Now, the next time you take a sip of your McDonald's coffee, you can ...