It's a soft drink specifically designed to avoid you getting hyponatremia, and was apparently inspired by doctors who would drink the contents of saline IV pouches.
Like many asian soft drinks it's not very sweet but it's not unpleasant. If you live on the US west coast you can find it in most Japanese supermarkets.
https://en.wikipedia.org/wiki/Pocari_Sweat
It's a soft drink specifically designed to avoid you getting hyponatremia, and was apparently inspired by doctors who would drink the contents of saline IV pouches.
Like many asian soft drinks it's not very sweet but it's not unpleasant. If you live on the US west coast you can find it in most Japanese supermarkets.