What is the best way to cook and present water for dinner guests?
i like to put mine on a double boiler at about mid-high for 8-10 minutes before straining it through a cheese cloth into a non-reactive container. then i'll cover it in plastic wrap, pressing down onto the water to create a seal so it doesn't oxidize. you can get away with chilling it in the fridge for 4-6 hours before serving, but i like to go overnight just to make sure.
Where you get your water matters.
I like to extract out from an uncooked ham. If you do it right, it shouldn't taste hammy. Pigs have the most diverse diet of any domestic farm animal, so their meat produces the best water.
My guests like to drink water from my dehumidifier bucket. It's from the air, so it's very pure and refreshing. When my guests sweat or exhale, they're contributing water towards the next meal.