Originally Posted by Pelikan
I'd guess they filter, then add just enough yeast for carb.
They do filter on the way to the bright tank, then filter again after the bright tank. Before bottling they store in a holding tank at the bottling line. At this point, they mix in the proper(??) amount of bottling yeast (which may or may not be their fermentation yeast). There is not a whole lot of yeast in there, nowhere near the amount you'd get in after a 4 week fermentation cycle. It's just enough to do the job of carbonation, so unless you get a really
old bottle you won't see much yeast, if any, on the bottom of the bottle.