I have been using this product for 10 years and have found that it works wonderfully with kava too, and you can take the packets with you anywhere and just pour it in a 1/2 bottle of water. If you're really looking to both re-hydrate and replenish electrolytes then this is the way to go. I think its especially good if you drink a lot of water in any circumstance.
if you live in the 3rd world and get diarrhea that could save your life, even if you make it with "dirty" water. If this were made available to children everywhere, many more would live.