Stirred vs. shaken is not just style
Cocktails made entirely of spirits, like a Martini or an Old Fashioned, are typically stirred to chill and dilute them gently without adding excess air or ice fragments. Cocktails containing citrus juice or other non-alcoholic mixers, like a Margarita, are shaken to combine and chill them thoroughly, since shaking integrates those ingredients better than stirring can.
Quality ingredients matter more than exotic equipment
None of these drinks require specialty bar tools beyond a shaker, a jigger for measuring, and ice. Using fresh citrus juice instead of bottled, and a spirit you would actually want to drink on its own, generally improves the result far more than any gadget would.
Frequently Asked Questions
Can these be made without alcohol?
Non-alcoholic spirit alternatives now exist for gin, whiskey, and rum styles, and several of these drinks (particularly the Mojito and Moscow Mule) can also be reasonably approximated using their non-alcoholic mixers alone, minus the spirit.
What is the one tool worth buying if I only get one?
A jigger (a small double-sided measuring cup) is generally considered the highest-impact purchase, since accurate measuring is what keeps a cocktail balanced rather than too strong, too sweet, or too diluted.