This is great for rapid hydration. I brought this to Vegas on a girls trip, and everyone was so thankful for them! We all took a tablet in the morning and it saved all of us after a late night out! These were also very easy to transport on a flight! The only downfall is you have to use the powder in a water bottle, if you put in a cup it doesn’t fizzle like the tablets, and a lot of the powder kept getting stuck on the bottom of the glass cups instead of mixing with the water.