Slow Wine Pourers (corked) are used for wine tastings and wine sampling and are exclusively for corked bottles. These pourers deliver a slow controlled pour when just a sampling of wine is desired. This product is used by wine distributors, wine importers, wineries, wine retailers, bars, and more! They are not only a wine pourer but also a bottle stopper. The cap seals the bottle for storage with a tight, dripless, seal. This pourer is not intended for home use. They will not work for screw capped bottles.