Monkey Wrench
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No mixing glass? A pint glass or the shaker tin.
No bar spoon? Any long spoon or a chopstick.
No strainer? Hold the ice back with a spoon or small sieve.
3. Add Grapefruit juice (90 ml)
4. Add Angostura bitters (1 dash)
5. Stir
With ice, about 30 seconds.
Spec via TheCocktailDB