100% pure spring water. From Maine. Natural rocks are square cocktail style ice cubes made from 100% pure Maine spring water. Natural rocks ice company selects only the best quality spring water to produce premium crystal clear ice. The spring water used in making this ice is protected by acres of Maine conservation land and evergreen forests. The natural mineral content. In our premium spring water produces a harder clearer ice with no sodium and no aftertaste. When you use natural rocks ice to chill your favorite beverage, you taste the drink, not the ice. The original spring water ice, since 1990. www.naturalrocks.com. Protect our earth. Reuse this bag. Spring Water Source: Fryeburg Maine.