Corkcicle goes where glass can't! Enjoy your favorite cold or hot beverage anytime, anywhere with this tumbler. Triple-insulated stainless steel easy-grip flat sides and no-slip bottom. Corkcicle tumbler keeps cool drinks cool for up to 9 hours and hot drinks warm for up to 3 hours. No cumber-some cooler needed and no annoying "cup sweat". No freezing required. Just pour and enjoy!