The entire cup folds into a peak, which becomes an integrated lid. The measured peaks and valleys of the folds make it impossible for the lid–which is part of the technically lid-free paper cup ...

The cup also has a foldable paper lid, cutting the need for a plastic top. It will be available in the U.S. later this year. Contact us at letters@time.com. EDIT POST ...

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.

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 ...

Luellen, who was one of those people, was distressed by the now-obvious health hazards posed by a communal cup. In 1907, he invented a paper cup ... the tearable lid, and 7-Eleven.

So that's what happens inside my cup. Copyright: Convergent Science Scientists have worked out why coffee spits out of the lid of a disposable cup. Why does it happen ...