Designed in Japan, the Kinto Travel Tumbler is a practical and functional way to stay hydrated on the go, reducing use of plastic bottles and disposable coffee cups at the same time. Made of durable 18-8 grade stainless steel with a double-walled vacuum construction, this travel flask for hot and cold drinks works efficiently to preserve the temperature of its contents and ensure your refreshment. Maintains hot contents at above 65℃ for six hours and cold contents at below 8℃ for six hours.