Building Wells: Each bottle features the name and coordinates of a community you help with your purchase. Together, we are providing lasting clean water for this specific community in need. Premium, Double-Walled, Vacuum Insulated: The Ripple insulated stainless steel bottle is double walled and vacuum insulated, keeping your beverage hot for up to 12 hours and cold for up to 24 hours Powder Coated 18/8 Stainless Steel: This insulated stainless bottle is made from premium gauge 18/8 stainless steel. We have chosen from the most popular colors. The powder coating is durable and gives the container a textured and vibrant finish. BPA Free, Sweat free, and Burn Free: BPA-free so you don’t have to worry about harmful chemicals.