Beautiful, practical, and high-quality, the thermos from the Spanish Cool Bottle is made to provide our little friends with proper hydration during all their activities. With triple cool technology (three walls) to keep drinks cold for 36 hours or hot for 18 hours. All bottles in the Cool Bottles series are made from 18/8 stainless steel, free from BPA, phthalates, and toxins, while also meeting all quality standards.