BTL SVC Cocktails - pronounced "bottle service," by the way - sells pre-mixed, ready-to-serve cocktails that have everything included but the ice and the garnish
The company operates out of West Hollywood, and I ran across their tasty bottles at The Cocktail Lab, also in Los Angeles. BTL SVC says they make "classic cocktails taste as good as you can get at your favorite bar," and that's right on the money. The company has their product in many good local wine and liquor stores and a smattering of L.A.'s ritzier hotels.
BTL SVC makes such bottled delights as a Gin Martini, Negroni, Manhattan and Old Fashioned. If you’re looking for something really different, they have a Ginger Buck, 1934 Cosmo, Matador and Spicy Maid to offer.
Nathan Oliver is the Master of Cocktails for BTL SVC, described as "a well respected artisan in the world of mixology." His decade behind a bar produced the classic recipes used for their drinks.
The drinks are a little smaller than I would make at home, but I find that's the case in bars, too. Each little bottle costs $12, less than what I generally pay for a cocktail in a good Los Angeles bar. The taste is great for the Martini and the Negroni, and I'm still working my way through the others I bought.
Follow Randy Fuller on Twitter