Scientists in South Korea have decided to go away, with their equations, experiments, simulations and whatnot, to find the best way to hold coffee for minimal spillage.
They have decided we've been doing it wrong.
The study, published in the journal Achievements in Life Sciences found that if we hold a cup by the handle or the outside, we add to the force with which the coffee moves inside the cup, making a spill more likely.
Instead, they recommend the 'claw hand' technique in which you grip over the top of the cup.
Here's a helpful guide:
Pictures: Achievements in Life Sciences
We're a little bit suspicious.
What about hot steam? What if the mug's slippy? What if you have a cardboard cup with the flimsy lids? What if you have appalling grip strength?
The other suggestion from the researchers was walking backwards.
Mr Han, of the Korean Minjok Leadership Academy, said:
By walking backwards, we are able to significantly change the frequency characteristics of our hand motion….leading to a subsequent decrease in the probability of coffee spilling.
Of course, walking backwards may be less practical.
Hmmm. Maybe take this one back to the drawing board?