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