What is the most hydrating drink in the world?

When it comes to staying hydrated, which beverage reigns supreme as the most effective in replenishing our bodies' water levels? Is it the classic glass of water, known for its purity and direct replenishment? Or could it be a fruit juice, offering a boost of vitamins and minerals along with its hydrating qualities? Perhaps a sports drink, designed specifically to replenish electrolytes lost during exercise, holds the title? The question lingers: what truly is the most hydrating drink in the world, and how does it surpass the rest in its ability to quench our thirst and maintain optimal hydration?