The Pentagon spent $170K on a study called 'Walking with coffee: Why does it spill?'


If you walk carrying an uncovered cup of coffee, it will probably spill.
To unravel the great mysteries of this phenomenon, the Pentagon gave $170,000 to researchers at the University of California, Santa Barbara. The grant was made through the Defense Advanced Research Projects Agency, whose mission is "to make pivotal investments in breakthrough technologies for national security."
In a resultant study entitled, "Walking with coffee: Why does it spill?" the scientists found that "in the walking with coffee problem the motions of the human body, while seemingly regular, are quite complex and are coupled to a coffee cup and liquid therein, which makes it difficult to unravel the precise reasons behind coffee spilling."
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
They ultimately determined differences like "common cup sizes, the coffee properties, and the biomechanics of walking [are] responsible for the spilling phenomenon."
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Bonnie Kristian was a deputy editor and acting editor-in-chief of TheWeek.com. She is a columnist at Christianity Today and author of Untrustworthy: The Knowledge Crisis Breaking Our Brains, Polluting Our Politics, and Corrupting Christian Community (forthcoming 2022) and A Flexible Faith: Rethinking What It Means to Follow Jesus Today (2018). Her writing has also appeared at Time Magazine, CNN, USA Today, Newsweek, the Los Angeles Times, and The American Conservative, among other outlets.
-
5 inexcusably hilarious cartoons about Ghislaine Maxwell angling for a pardon
Cartoons Artists take on the circle of life, Ghislaine's Island, and more
-
Ozzy Osbourne obituary: heavy metal wildman and lovable reality TV dad
In the Spotlight For Osbourne, metal was 'not the music of hell but rather the music of Earth, not a fantasy but a survival guide'
-
Sudoku medium: August 2, 2025
The Week's daily medium sudoku puzzle
-
Samsung to make Tesla chips in $16.5B deal
Speed Read Tesla has signed a deal to get its next-generation chips from Samsung
-
FCC greenlights $8B Paramount-Skydance merger
Speed Read The Federal Communications Commission will allow Paramount to merge with the Hollywood studio Skydance
-
Tesla reports plummeting profits
Speed Read The company may soon face more problems with the expiration of federal electric vehicle tax credits
-
Dollar faces historic slump as stocks hit new high
Speed Read While stocks have recovered post-Trump tariffs, the dollar has weakened more than 10% this year
-
Economists fear US inflation data less reliable
speed read The Labor Department is collecting less data for its consumer price index due to staffing shortages
-
Crypto firm Coinbase hacked, faces SEC scrutiny
Speed Read The Securities and Exchange Commission has also been investigating whether Coinbase misstated its user numbers in past disclosures
-
Starbucks baristas strike over dress code
speed read The new uniform 'puts the burden on baristas' to buy new clothes, said a Starbucks Workers United union delegate
-
Warren Buffet announces surprise retirement
speed read At the annual meeting of Berkshire Hathaway, the billionaire investor named Vice Chairman Greg Abel his replacement