CamelBak Ergo Hydrolock Valve
The 90-degree bend in CamelBak's Ergo HydroLock puts the Big Bite Valve into an ergonomic position for drinking. With a simple flip, the on/off mechanism can be activated or shut off.
If you have weird mouth ergonomics or like to sip from the side like a gangster-lookin' kid with her sippy bottle, then this is your jam. Jokes aside, it makes it easier to get the nipple in your mouth. And who doesn't want that? Also, the lock function is nice for when you throw your pack somewhere that might accidentally squeeze the nipple open.