What is the “sediment” I discovered on the bottom of the bottle?

The sediment evident in the bottom of a bottle of Sierra Nevada Pale Ale and other naturally conditioned beers is the yeast we use for bottle conditioning. Typically, the yeast lies tight and flat to the bottom of the bottle. As the beer is poured, the yeast will re-suspend making the beer’s appearance cloudy or slightly particulate, but this will not adversely affect beer flavor. If bottles are stored improperly (e.g. upside down or on their side) the yeast may resettle into what looks like a drop of pancake batter or vanilla ice cream and will be more apparent, but it will still not affect the finished flavor of the beer.