The natural beauty of walnut wood inspired this new look for Corkcicle. Goes where glass can't! Enjoy your favorite cold or hot beverage anytime, anywhere with this canteen. Triple-insulated stainless steel easy-grip flat sides and no-slip bottom. Corkcicle Canteen keeps cool drinks cool for up to 25 hours and hot drinks warm for up to 12 hours. No cumber-some cooler needed and no annoying "bottle sweating". No freezing required. Just pour and enjoy!