Where can one buy a cocktail mixer online?

Here are a few websites where you can purchase a cocktail mixer online:

1. Amazon: Amazon has a wide variety of cocktail mixers available, including popular brands like Mr & Mrs T, Stirrings, and Finest Call.

2. Cocktail Kingdom: Cocktail Kingdom is a specialty retailer that carries a wide variety of barware, including cocktail mixers. They offer a variety of mixers, including syrups, juices, and bitters.

3. Total Wine & More: Total Wine & More is a leading retailer of wines, spirits, and beers. They also offer a variety of cocktail mixers, including popular brands like Schweppes, Q Mixer, and Fever-Tree.

4. The Bitter Truth: The Bitter Truth is a German bitters company that also produces a variety of other cocktail mixers.

5. Fee Brothers: Fee Brothers is a leading producer of bitters and cocktail mixers.