Step 1.
- Chill a martini glass by filling it with ice water.
Step 2.
- In a cocktail shaker, combine the vodka and olive brine with ice.
Step 3.
- Stir gently to mix, keeping the drink cold.
Step 4.
- Dump the ice water from the martini glass and strain the mixture into the glass.
Step 5.
- Garnish with a green olive.