Works fine with the big bite valve, but it doesn’t work at all for my S10 Gas mask. I bought the Type A Adapter for it and it does not function like it is supposed to. Water does not flow from the adapter and through the S10 drinking tube. I tried using my other S10 and it didn’t work either. It could be that the drinking tube systems on both of my masks don’t work or have some some sort of air leak.
Overall, I’m sure the bladder is not the issue- maybe the adapter that works with the hydration system is.