I drain the filter housing into a pig.
I have recently bought the VW tool (a threaded collar with a bit of vacuum tubing attached) to ensure there is no mess made.
You unscrew the cap on the bottom of the filter housing, press in the little nipple and 'lodge' it to one side allowing the oil to flow out.
The Vw tool screws onto the bottom of your filter housing, where the little nipple is and in doin so operates the nipple allowing oil to flow down the tubing so you can direct it into your oil pig, brew, mouth where ever you like
Hope that's a bit clearer for you