Long vodka
Angostura bitters
4 dashes
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No cocktail shaker? A jam jar with a tight lid works.
No strainer? Hold the ice back with a spoon or small sieve.
3. Add Angostura bitters (4 dashes)
4. Add Tonic water (1 piece)
5. Shake
With ice, about 12 seconds.
Spec via TheCocktailDB