“The triangular, straight sides are the calling card of the martini glass, but they are also their biggest downfall. Most cocktail coupes have a curved bowl that helps to keep any sloshing liquid contained within the rim of the glass. The straight sides of the V-shaped martini glass are particularly precarious because any tipping, no matter how slight, can lead to a considerable loss of liquid from the glass. That said, practicality is not always at the top of people’s lists when choosing cocktail glassware, and some people just like the look and feel of the classic triangular martini glass, and that’s fine.”