Isosteel VA-9553Q 34 fl. oz. Double Walled Vacuum Flask with Isulating Plastic Drinking Mug and Quickstop System for One Hand Use 18/8 Food grade stainless, BPA free, FDA LFBG approved, heat retention even better than VA-9552Q Editors Choise Popular Mechanics Easy one Hand Quickstop use (screw plug available), approved by German Military Keeps extra long hot or cold best perfoming Vacuum technology 5 Years limited warranty for service info@isosteel.de