ADBV feels like cardboard but at least still looks flexible with whatever heat cycles, time, mileage it has.
Serious question without hitting all the sticky's and university 101. How much does a stiffer ADBV like nitrile affect the system when mounted on a vehicle that opening's face up? Does it siphon out when sitting? Is it that it needs a bit more pressure for flow being stiffer or not sealing as well?
I have 11 more of the Ecogard X10479 to use on a 2021 Tucson and a 2010 Forte. They look just like the can in OP's picture. I have not cut any yet, just installed the first one Saturday. They will be in use for 4000-5000 miles based on vehicle.