ZERO SUGAR ELECTROLYTES: Nuun Zero Sugar Hydration is an effervescent tablet for everyday hydration and water enhancement, made with essential electrolytes to keep you going and zero sugar to hold you back (1) HYDRATION WITH A BOOST OF CAFFEINE: Each Sport + Caffeine electrolyte tablet contains 40mg Caffeine, and each Daily Energy tablet contains 80mg Caffeine from Green Tea Leaf Extract for times when you need hydration with a gentle boost of energy 5 EVERYDAY ELECTROLYTES: Nuun Sport electrolyte tablets provide optimized quantities of Sodium (300 mg), Potassium (150 mg), Chloride (40 mg), Magnesium (25 mg) and Calcium (13 mg) to keep you hydrated during sweat and exercise VEGAN, NON-GMO & NO SUGAR: These electrolyte tablets are made with clean*, plant-based ingredients and contain 0g or 1g sugar for smart sipping all day, every day (1) LIGHT, DELICIOUS FRUIT FLAVORS: This Nuun 4 pack contains 1 tube of each refreshing flavor: Zero Sugar Raspberry Lemonade, Sport Lemon Lime, Energy Berry Blast, and Sport + Caffeine Wild Berry for a total of 40 servings (1)