Hello,
Canteens are good for both WWI and WWII, it is gaz mask that are not !
M2 gaz mask (those you show on your picture on the left of canteens)were in use from 1916 to 1918.
During WWII, the only respirator box for french army is" ANP 31" (for normal protection system patern 31). It is a kind of rectangular bag.
regards
Paco