| Ingredient | Amount |
|---|---|
| Vodka | 1 2/3 oz |
| Lime | 1/2 |
| Angostura bitters | 4 dashes |
| Tonic water | 3 1/2 oz |
| Ice | 4 |
Shake a tall glass with ice cubes and Angostura, coating the inside of the glass. Pour the vodka onto this, add 1 slice of lime and squeeze juice out of remainder, mix with tonic, and stir. Serve.