I used the bitevalve of a CamelBack Eddy bottle I had at home. Perfect fit (the bite valve is quite big, but does the job). I also tried the Camelback Big Bite Valve, but it wasn't working at all. I read online that the new Eddy is different from the older models. My best bet would be to try to find one in store and see if it fits.

I am considering trimming the valve down in the future... I will see.

https://www.camelbak.com/...4af9b0af71e14eef5d55