The Santeco Koya is a 500 ml vacuum insulated water bottle in Vine Purple, with a wide-mouth screw lid and a fold-down carry handle. It is made of food-grade 18/8 (304) stainless steel with a durable matte powder coat and double-wall vacuum insulation, which Santeco rates to keep drinks cold for up to 24 hours and hot for up to 12 hours. The wide mouth makes it easy to add ice and to clean, and the bottle does not sweat. It is compact enough for a handbag or backpack and suits the office, gym or a hike. It is BPA free and leaves no chemical taste or smell.