Related Clues:

• Fountain selection
• Fast-food beverage
• Picnic beverage, perhaps
• Pepsi or Coke
• Puck
• Caffeine source, often
• RC or Jolt
• Fountain choice
• Vending-machine offering
• Fruit juice alternative
• Bubbly, brown potable
• Popular mixer
• Dark soft drink
• Caffeinated drink
• Jolt, e.g.