Isosteel VA-9553AT 1.0 Liter 34 fl. oz. Double Walled Vacuum Bottle With Screw Stopper Unbreakable, leakproof double O ring srew plug high qualitiy vacuum technology, more than 24 hours hot-48 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