Pour ginger ale into an 8 oz. clear tumbler or tall narrow glass. Add dried cranberries and a decorative straw. After a moment, cranberries will begin to slowly float up and down in glass, like a lava lamp. Garnish with a decorative straw. Makes 1 serving. * Tip: Make colorful lava lamps, use cranberry or raspberry-flavored ginger ale, orange soda or apple-flavored sparkling cider. Any carbonated, lightly-colored beverage will work.