disposable hot-beverage lids” to be precise – are pure function. While it goes without saying, a good lid design prevents liquid from leaking out of the opening of the cup, ensures that the drink can ...

"Delta Air Lines, after two years of prototyping and testing, will replace single-use plastic cups with recyclable paper ones ...

In the US alone, 120 billion disposable coffee cups are used every year. But it's more than just the cups and the lids that are creating waste. What about all those used-up coffee grounds?