This issue caused a lot of controversy when British builder Paul Hopkinson originally shared this video on Costa Coffee's Facebook page.  

Responses ranged from angry (and very British) to extremely pragmatic.  Costa coffee themselves also responded to point out that the larger cup has space at the top and if the smaller cup did too that would equal the difference in size AND that the larger cup has two shots of espresso as opposed to one. 


via Paul Hopkinson

As for the engineer's math, we're going to take his word for it and assume that he's solved the mystery of why both cups seem to hold about the same amount of liquid. 

Walter's Coffee Roastery opened up in Instanbul about a year ago. It was a wonderful idea, presumably based off of this sequence from the TV series 'Breaking Bad':



Now they are bringing the chemical themed roastery and coffee shop to Brooklyn, New York by the end of this summer.  They plan to bring the same level of coffee chemistry and 'Breaking Bad' references that caused the internet to fall in love with them in the first place. 

Since the dawn of sliced bread have we not seen such grand ingenious culinary innovation. Yes folks, in large thanks to Brandeis University professor Daniel Perlman, we're about to take a step into a world where you can sustain a legit caffeine buzz (like several cups worth) off a muffin.

During his interview with Eater, Perlman says, "This flour contains 2.5 percent caffeine by weight, so if you were to put 4 grams of this into, say, a breakfast muffin, it would be the equivalent of drinking a cup of coffee."

Hold the phone. Say what now? And yes, it gets better; this flour's derived from green coffee beans, and rich in major health benefits. The roasting process for these green coffee beans helps retain antioxidant chlorogenic acid, which scientists believe can significantly diminish your risk of heart disease and diabetes.

If you're someone who's susceptible to over self-medicating on that java fix, Perlman says not to worry too much. He explains, ""Unlike some bars that are loaded with chemically purified or synthesized caffeine, this is natural food source caffeine. I would expect it to be absorbed a little more gradually than the caffeine in a cup of coffee, so [it would offer] a more sustained release and longer-term stimulation than you get when you drink a cup or two of coffee."

Perlman additionally informed Eater his coffee flour is a "very user-friendly ingredient", meaning it's pleasingly easy to bake with. Put your hands together and give a warm round of applause my fellow novice bakers.