There's nothing more refreshing than a glass of ice water with a slice of lemon or a wedge of lime added for a subtle hint of citrus flavor. Another solution is to use these cool new Citrus Ice Cube Trays ($10) to freeze lemon or lime juice in place of regular ice cubes. These unique ice trays come in a set of two, create dimensional citrus slice cubes and are flexible for easy cube removal. I can't wait for a hot summer day to truly enjoy this. (via Michael Kiely)