Published April 11, 2019 19:41 What is the caffeine content in your Energy Drink mix? Is is the same across all of your caffeinated flavors? The Energy Drink has 80mg of caffeine per 8oz serving. Other SodaStream caffeinated flavors contain 31 mg per 8oz serving. Related articles If I want to carbonate my water and store it for later, how long can I expect it to store before going flat? Do your flavor syrups contain aspartame? Do your Fruit Drops flavors contain sucralose? How do I get the perfect fizz? The fruit flavor ingredients say "natural ingredients". What does that even mean?