These handy-dandy little tablets are pretty cool! Nuun Tablets (http://www.nuun.com/) are great little tablets filled with electrolytes. They have no sugar, are less than 8 calories each and come in approximately 10 different flavors. Nuun Tablets are very easy to use - just drop a tablet in 16 oz. of water, let the tablet fizz until dissolved (I shake mine a little to speed things along) and enjoy. I personally like that the tablets are sugar-free. My tummy sometimes gets upset when drinking sugary sports drinks during long runs so Nuun's have been helpful in alleviating the stomach upset. One of the best things about the product is it's portability which is especially handy on long runs. Nuun Tablets come in a crush-proof, waterproof plastic tube that is very convenient because it fits in a pocket or waist pouch. I really can't say enough about this product. I have been using Nuun's for at least 4 years now and really like them. I even take a tube with me in my purse so that I can drop a tab in a bottle of water on excessively hot days. Give them a try, see how they work out for you!