East German Canteens

I came across this informative video which profiles 3 versions of post WW2 canteen produced by East Germany for the NVA.

Three East German Army NVA Canteens - YouTube

The old style aluminum are the ones that interest me most:

https://www.milsurps.com/images/impo...P1070670-1.jpg

https://www.milsurps.com/images/impo...P1070671-1.jpg

https://www.milsurps.com/images/impo...P1070673-1.jpg

https://www.milsurps.com/images/impo...P1070677-1.jpg

Were the old style East German Aluminium canteens based on the WW2 version/design?