It's important to drink plenty of water.
Brad has just gotten back from a long hike and is feeling very thirsty.
Brad wants to get something to drink.
Brad drinks a quart of cold water to quench his thirst.
Brad drinks a rum and Coke cocktail to quench his thirst.
Brad's thirst is quenched, and he feels refreshed and hydrated.
Brad becomes more dehydrated and develops a minor headache.