Wine thief

Wine thief: A long tube used for taking samples of wine from barrels.
Yeast: Organisms that issue enzymes which trigger the fermentation process; yeasts can be natural or commercial.

WINE THIEF
Sampling tube made from clear glass or plastic tube having a narrowed opening at either end.

A wine thief is another handy instrument that home brewers use frequently. It does what its name implies: it can take a sample of your beverage without pouring or siphoning it from the container.

See also: Grape, Thief, Taste, Color, Winemaker