Tony Fisher, owner of The Pulp & The Bean, said the Dieci, named after the Italian word for 10, went on sale Tuesday after he realized the all-espresso drink had "never been done before," the New York Daily News reported Wednesday.
"It just dawned on me that people really love espresso, so why not just give them a cup full of espresso?" Fisher said.
"It's 20 ounces of just thunder," he said. "One giant cup of jet fuel."
Fisher said the Dieci, billed on a sign outside the shop as "coffee porn in a cup," is ideal for "on-the-go" customers, such as students.
Dr. Jacob Shani, chief of cardiology at Maimonides Medical Center, urged caution in consuming high-caffeine beverages.
"It will make the heart beat a little faster, and it will increase blood pressure," he said. "If you're young and healthy you will get away with it, (but) it's not something I would recommend."