Isosteel VA-9556Q 25 fl. oz. Double Walled Slimline Vacuum Flask, Screw Stopper, Quickstop System - Single Hand Pouring, Insulating Plastic Drinking Mug - BPA free same vacuum technology and performance as VA-9552Q rated Editors Choice by Popular Mechanics March 2016 high performance vacuum technology, 24 hours hot or 48 hours cold 18/8 stainless steel | BPA FREE, FDA and LFBG approved, 100% recycable removable drinking cup, easily one hand operated by QUICKSTOP 5 years limited warranty, for customer service: info@isosteel.de