Riddling is a process used in the production of sparkling wines. It involves moving the resulting sediment from the second fermentation to rest in the neck of the bottle thus aiding easy removal. The bottles are loaded horizontally onto wooden racks known as pupitres. At this point the sediment rests on the bottom of the bottle, ie the side. As the bottles are riddled or given a quarter turn daily and gradually tilted upside down the sediment works its way into the neck of the bottle. Some smaller cellars still do this by hand but people are increasingly turning to mechanical riddlers.