275ml capacity 6 hours of cooling (at least) Vacuum insulated double wall stainless steel Screw on Stainless Steel lid. Comes with a stainless steel and silicone stopper straw. Bright, fun colours in a scratch and dent resistant finish. Easy to keep clean. Montii won’t hang onto flavours. Dishwasher safe to 70°C. Not suitable for hot liquids.