RAIN Pure Mountain Spring Water | 1,464 followers on LinkedIn. Leading brand and manufacturer of natural spring water bottled at the source in infinitely recyclable aluminum bottles. | Better For You, Better For The Planet RAIN Pure Mountain Spring Water is bottled at the source in resealable aluminum bottles. These bottles are infinitely recyclable and recycled most often. Our natural spring water has been filtered through ancient underground rock formations collecting natural electrolytes and minerals for a light, crisp, easy-to-drink flavor.