Nuun Tubes are the ticket for electrolyte-packed hydration without all the sugar of typical sports drinks. Each tube contains 12 Nuun tablets, and each tablet has enough Nuun electrolytes for 16 ounces of water. Each 16-ounce serving contains just 5 calories and absolutely no sugar. Nuun offers the tablets in 11 different flavors to satisfy your post-workout cravings.