I also use Nuun for rides over 1.5 hours, supplemented by Shot Blocks on hard, hot, or long rides. I no longer use any sports drinks, after using Accelerade or Gatorade for years. I don't want the calories or sugar. I keep a tube of Nuun tablets and a pack of Shot Blocks in the bag on both of my bikes. I've had to give one or both to other riders more than once, because they were unprepared, started bonking, etc.