Stand strong for crystal clear waters with the Dopper Steel 1. 1L. This knight in shining armour is cool and robust and fits perfectly into a sports bag. A must have for those of you who love sports and the outdoors! This insulated bottle will keep your water, tea or coffee hot for 9 hours or cold for 24. The Dopper Steel holds 1. 1L. The three part design means its easy to fill and easy to clean by hand or in the dishwasher (max 65 degrees)