Hard water stains can make your glass surfaces look dirty, even when they're not. Fortunately, the solution to these stains ...

In a glass, add the lemon slices, cucumber slices, and fresh mint leaves. Pour cold water over the ingredients, filling the glass to the brim. If desired, add ice cubes for an extra chill.

The findings showed that drinking 200ml of water—a single glass—was enough to reduce thirst, anger, fatigue, and poor mood. Drink two glasses, and you help to improve your working memory, too.