For 1 serving, use 25 mL or ¾ oz measures

• 1 part neutral vodka
• 1 part neutral white rum
• 1 part neutral silver tequila
• 1 part neutral gin
• 1 part top-shelf orange curaçao (e.g., Cointreau or Gran Gala)
• 2 parts sour mix (2 parts 50:50 simple syrup, 1 part lemon juice, 1 part lime juice)
• Cola to taste

Combine alcohols and sour mix in a cocktail shaker with ice. Shake vigorously for 20 seconds, and pour into a pint glass. Top up with cola. Garnish with a citrus round.