Isosteel VA-9553 1.0 Liter 34 fl. oz. Double Walled Vacuum Bottle With Screw Stopper Unbreakable, Leakproof, German Military approved high qualitiy vacuum technology, more than 12 hours hot-24 hours cold 18/8 Food grade stainless steel | BPA FREE, FDA and LFBG approved removable drinking mug, srew plug for extra tight sealing and best heat retention 5 years limited warranty, for Service info@isosteel.de