The sustainable travel mug combines luxury and sustainability, crafted from recycled 304 stainless steel as a statement of eco conscious style. Featuring a screw on, leak proof lid, its designed to handle frothy beverages with ease, and the cap includes a carrier loop for attaching an optional crossbody belt, making it a convenient, hands free option. With Coppertech double wall insulation, this 400ml tumbler keeps drinks cold for up to 12 hours or hot for 4 hours. Durable and dishwasher safe, Vortex Calix offers both functionality and lasting temperature control for your beverages. Dishwasher safe4 hours hot/warm 12 hours chilled 18 hours iced.