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===Supplementing another fermentation===
Once the starter of the bottle dregs has sufficiently incubated, it can be pitched into another sour beer. The idea here is that the strong microbes from the commercial sour beer can enhance the overall complexity of the beer, especially if the beer's only other inoculation was from a culture from a yeast company.
===Using as a primary fermenter===
Bottle dregs can also be used a primary fermenter. It is generally advised that mixing different bottle dregs together will provide a greater diversity and thus better results, but using a single bottle may prove to be an educational experience as well. Jeffrey Crane describes a method of using 1 gallon of wort, which can easily be produced on a normal brew day from a larger batch, to create sour beer from bottle dregs. Essentially this process involves transferring 1 gallon of at wort any time during the boil when there are less than 7-10 IBU's. That 1 gallon of wort is then used to pitch the sour beer dregs starter into.<ref>[http://www.homebrewtalk.com/f127/easy-way-make-sour-beers-1-gal-wort-dregs-189748/ Jeffrey Crane] describes how to make 1 gallon sour beers from bottle dregs.</ref> The brewer has the option of allowing the 1 gallon of sour beer to age on it's own, or it can be used as a starter itself for a larger batch.
===Storing Dregs For Later Use===
It is often the case that a potential bottle dregs beer will be consumed before the brewing of the wort in which it would be added. There are several options and suggestions on storing bottle dregs beers <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1079510575410489/ Conversation on Milk The Funk. 5/28/2015.]</ref>.
* Pitch the dregs directly into a fermenter with beer.
* Have an air-locked vessel such as a gallon jug or an Erlenmeyer flask with an airlock on it with a starter beer (or fresh wort) ready to collect multiple bottle dregs.
* Leave the last quarter inch of the beer in the bottle itself, and recap if possible (if not, cover it with plastic wrap or tin foil), and place it in the refrigerator. Keeping the beer cool should prevent spoilage, although this is not guaranteed without more careful procedures such as purging the bottle with CO2 and capping it. Although brewers have successfully stored bottle dregs beers like this for months, it is generally advisable to make a starter for the dregs withing a few weeks at least so as to avoid any potential spoilage.
==List of Unpasteurized Commercial Sour Beers==