That's what the manual says alright. That would be around 17oz.
But it's not right.
I believe it's more like 10oz or 12oz at max as that is all I can get into mine before it goes over the fill dot in the indicator.
I just drained mine it was just a bit overfilled and got a little over 10 oz out of it. There may be a couple of oz in there still as you can get it all out.