Double walled stainless steel water bottles keep liquids cold for 24 hours and hot for 12 hours. A wide mouth with a bamboo lid makes it easy to fill, while a steel handle makes this canteen-style vessel perfect for outdoor fun. Function & Style: This durable double-walled canteen-style vessel is perfect for outdoors, office, picnics, hiking and on-the-go.Care: Hand wash only.Do not microwave.Capacity: 530ml / 18 ozReusable Water Bottle:A wide mouth with a bamboo lid makes it easy to fill with water, ice cubes and more.