This test report was made by  Qingdao Technological University

Time：AM8:56—Pm22:25, Sept.6^th,2012

Place: Lab of Qingdao Technological University

Test people: Professor Wei,Assitance Mr.Zhang

Test equipment: offered by Qingdao Technological university

Test subject：56cans cooler bag PQD303, inside 10 bottles of 600ml Qingdao beer (which were stayed in freezer over 12 hours. the average  tem. Is 5.6℃

Material of cooler：insulation layer: 10mm EPE covered by 0.15mm Alu foil,outside；600D polyester

Test mouthed：put the packed cooler bagr in the normal room enviroment, then put the temp. sensor inside, the computer record the variation of temp. every 20 minutes in 13 hours.