I buy the Recharge from the health food stores, but there are also many recipies on the net you can try. Here is part of one and I posted the link too:
Fruit juices can be diluted to obtain the 6-9% carbohydrate needed to be most effective. Research indicates that homemade drinks made with diluted fruit juice are similar in composition to scientifically formulated commercial sports drinks, but are lacking in sodium. This is easily remedied by adding a pinch of salt to your recipe. If you feel like whipping up a refreshing, thirst-quenching beverage give this recipe a try:
Basic Fluid Replacement Recipe
1-cup cold water
1-cup fruit juice (apple or orange)*
1 teaspoon sugar or honey
1 pinch of salt
Mix, chill, and enjoy!
*One cup of apple or orange juice has about 26-30 grams of carbohydrate. Keep in mind that not all fruit juices contain the same amount of carbohydrate, so read the labels when you want to try a new flavor. Just remember to keep the total carbohydrate level to about 14 grams per 8ozhttp://www.protraineronline.com/past/oct1/fluid.cfm
But honestly, the best best yummy thing is to make some rice
(brown or white, but preferably white) and drain off some water from the cooked rice, cool it down, and give it to baby. The starch liquid will slow the stomach upset and loose stools. The semi-warm liquid feels good, the nutrients are in the water, and the baby does not get a chemical load of blue dye #4 !!