To make the classic Martini one would use gin as the base, but if you’re feeling like James Bond you could use vodka instead. Or if you’re plain wild use a mixture of the two. Which ever spirit you choose, pour five parts of it to one part of dry vermouth into cocktail shaker full of ice.
Even if you’re feeling bond like, never shake the mixture, but calmly stir it as you will water the drink too much otherwise. For a “dryer” Martini use even less Vermouth, by just coating the glass with it, or “allow the light of a full moon to shine through the vermouth into a glass of gin.”
Finally strain the combination into a chilled martini glass, and depending on your taste add an olive or curled lemon peel. Under no circumstances should you add the prefix “tini” to any other drink (I shudder at the thought of a ‘chocolatini’). The Martini is I think the classiest drink going, but it’s not for the faint hearted due to very high alcohol content. Experiment by adding different things, my personal tip is to try a little Cointreau with it and replace the olive with a Morello cherry.