The Halsey Taylor HVRGRN Series are GreenSpec energy-efficient, vandal-resistant water coolers and are constructed of stainless steel. These drinking fountains have a mechanical vandal-resistant push-button bubbler activation, which continues to provide water when electrical service is interrupted; the the vandal-resistant SmartFlow™ bubbler reduces water usage and features a chrome-plated integral hood guard to prevent contamination from other users, airborne deposits and tampering. Select HVRGRN water coolers come with a "glass filler" option, making it more convenient to fill up cups and sports bottles. Also, be sure to check out other great items from Halsey Taylor.