Ordering a Guinness on drafts takes longer than most other beers. Part of the reason is the gas used to carbonate it: nitrogen. William Lee, a professor of Industrial Mathematics at the University of Huddersfield, discovered that the specially-designed Guinness pint glass causes the bubbles to sink. This increases the wait time for the beer to settle. From his findings in the study funded by the Science Foundation Ireland, Lee believes something closer to a giant martini glass would work better.
Via Tech Insider