Recently while beer shopping for a tasting, I noticed that Brooklyn Brewery's "Big Bottles" are labeled as 100% bottle feremented. when checking their web site, it says they use an old rarely used technique to referment in these bottles, but does not really describe the process or why they use it. Does any one know how this process works or what the goal is here? Just something I have not seen before and it intrigued me. Any info would be most interesting