Alan2219264 wrote a review of CamelBak Hydrolink Filter Adapter Kit on June 11, 2009
In general this is a good idea - this version is a little bulky (long) though and camelback makes a few others designed so the bite valve fits more snugly on one of the male ends. Many folks like the shut-off valve to avoid leaks - personally I always use a bite valve cover & never get any leaks so the shut off valve is superfluous for me. I actually made a version of this with commercial valve with auto shut-off features. This actually makes more sense to me (and is smaller). Overall a good but slightly too bulky product. (it is compatible with other brands and is the standard industry quick-connect size.
The issue with all these designs is that its a little difficult to know that you have fully filled your hydration sack while its still in the pack... no good solution seems to exist