We use the OXO turkey baster for the same application (sucking oil) and it is wonderfully efficient...These separate the water at bottom quickly when held vertcal briefly. Squirt water out into waste jar, then I squirt the oil in oil jar. Repeat a few times and done. It helps to use a tall narrow glass, but these do well also. EDIT: If you see the black relief on top. it has 2 positions. 1 is to vent so you can open quickly, but when cooking it should be in "Pressure" position, which is basically closed unless safety relief pressure is overcome. Only a safety, should not vent when in PRESSURE position, during cooking/decarb.