What are some German inventions and innovations that occurred during WWII?

Jerry can

Hitler knew the weakest link for his blitzkrieg strategy for his panzer divisions was fuel supply. he’d need a lot of oil to keep his blitzkrieg army going

so Hitler ordered his staff to design a small fuel container that could be carried and poured by hand and to minimize gasoline losses under combat conditions. As a result, the German army had thousands of jerrycans, as they came to be called, stored and ready when hostilities began in 1939. was first developed in 1937 by muller engineering firm in Schwelm

It had three handles, enabling one man to carry two cans and pass one to another man in bucket-brigade fashion. Its capacity was approximately five U.S. gallons; its weight filled, forty-five pounds. Thanks to an air chamber at the top, it would float on water if dropped overboard or from a plane. Its short spout was secured with a snap closure that could be propped open for pouring, making unnecessary any funnel or opener. A gasket made the mouth leak proof. An air-breathing tube from the spout to the air space kept the pouring smooth. And most important, the can’s inside was lined with an impervious plastic material developed for the insides of steel beer barrels. This enabled the jerrycan to be used alternately for gasoline and water.

The cross design on the side helps strengthen the can, while allowing the contents to expand. There was also an air pocket under the handles. A cam lever release mechanism and short spout with an air-pipe to…