Tip: don’t drink whisky when your thirsty!
Well let’s say 250 ml’s of water will take care of taking away your thirst!
If whisky is your choice than a 50% ABV dram would have you drink 500 ml of whisky! Resulting in 250 ml of water and 250 ml of alcohol!
You could drink that much whisky to have a 250 ml water intake, but you would probably turn into a basket case fruit loop from the 250 ml of alcohol. Or you could just die.
So, when thirsty, drink water, not whisky!