60 ml Gin, 10 ml Dry vermouth, 1 Lemon twist
The Martini glass
The V-shaped stemmed glass that has meant gin and vermouth since the 1920s.
Where it comes from
The stemmed cocktail glass is older than the Martini - it is late nineteenth century - but the sharp V is documented at the Paris exhibition of 1925, and that is the shape the drink took over. The stem is there so a hand does not warm the drink, and the wide mouth is there to be smelled before it is tasted; the same width is why the glass has a reputation for being spilled. The 1960s did more for its fame than any bartender did: Bond's martini arrived in one, and the glass has been a shorthand for the drink since.
The enormous ones are a later fashion and a bad one. A large cocktail in a wide glass is warm by the third sip, and 200 ml to the brim is already generous for a drink of ninety.
What to look for
A stem you can hold clear of the bowl, and a bowl narrow enough that the drink is still cold at the end of it.