A tall, refreshing drink is one of summertime’s pleasures; a diluted drink is not. Instead of filling your glass with ice cubes that melt, freeze slices of lemon, lime, and orange, then use them to add a cold blast of citrus to your iced tea, lemonade, or plain old glass of water. Slide a piece of plastic wrap between slices to keep them from sticking. They’ll stay fresh for up to two months when stored in an airtight container in your freezer.