I dumped mine after 5,000 miles or so... and replaced it with a section of 3/4" (I think) heater hose to extend it to just below the sway bar. It's there to catch any oil that may blow out of the crankcase breather (which is normal). But typically what happens is the oil mist that the engine exhales gets picked up by the fan and is scattered all over the front of the engine, radiator, and hood. Quite messy and can clog some of the radiator fins over time.
So, I just eliminated the bottle completely and ran the hose down far enough to clear the engine compartment. It does blow onto the axle, and it will leave the occasional drip on the garage floor, but that's much easier to clean up than the engine and radiator. Use caution as far as hose length and routing, 'cause you don't want it to get plugged, which will blow out seals in the engine if it can't breathe.