Fuel neck overflow, and airbox drain resevoirs... just remove the resevoirs, and ride till ya get new ones.. and al should be good. No big deal, just keeps crap from draining on the floor.. if stuff is draining that much, do some due dilligence, and find out "why"... mine have never had anything in them since purchase 7/7/07.....
Cracked one is likely the fuel overflow, and held gas in it for years, till it made the plastic brittle and it cracked.. and drained....one overfill on a hot day, and it sat with a solvent and reduced the plastic to a brittle stage...
Tuck the new one back in nicely, or, just put a piece of copper tube in the hose, after taking the bottle off, and adding another length of tube to let it drain on the grojnd.... and then, if there is a drainage, you will see it, and can address the cause.... old tech worked, new tech seems to negate "looking" at stuff...