Capacity: 450ml. Digital temperature display. Touch the top with your finger to get a digital reading of the interior temperature. The battery inside the lid is a fixed unit which is not replaceable, however will last for approximately 18000 uses. Insulated design suitable for hot and cold drinks. Thermal design keeps liquids cold for up to 24 hours or hot for up to 6 hours. Features a removable tea strainer that sits on top for loose tea leaves. It also comes with a handy strap.