We’ve all been there. You have a cup of hot coffee in a paper to-go cup with a lid, but when you go to take a sip the contraption betrays your trust and you spill hot liquid on yourself. Design is ...

Everyone knows the feeling of spilling hot coffee on their hands or pants. With a conventional coffee-cup lid, spills and leaks are a constant threat. Some establishments, like Starbucks, offer plugs ...