Something long shipping (6 days), quality is ok, but the 12 Hours cooling capacity are completely coated. After storage period of at least 24 hours in the freezer (-18Grad) the batteries are after 4-5 hours already Handwarm (in a AluKühltasche with about 20 degrees outside) For the price you can not complain. In comparison, my Bosch freezer were also two (larger) cooling batteries The really keep 12 hours. However, there will not (longer) as a substitute.
