The Happy Double Wall Bottle is a 450 ml (15 oz) insulated water bottle that is designed to keep your drinks cold for up to 24 hours or hot for up to 12 hours. The double walled construction provides excellent temperature insulation, while the leak-proof design and durable materials make it perfect for on-the-go use. The bottle also features a convenient carry handle and a wide mouth for easy filling and cleaning. The design of the bottle is elegant, colorful and has a sleek look, suitable for all ages and gender.