The Melbourne mug features a double-walled air-insulated thermal mug that keeps drinks hot for 2 hours and cold for 4 hours. The inner wall of the mug is made from recycled plastic and the outer wall is made from RCS certified recycled stainless steel. The mug has a capacity of 1200ml, enough to stay hydrated throughout the day. It features a spill-proof push-top lid with two openings and a twist lock. It comes with a food-grade recycled straw. Hand wash only.