With DropStops, you will never get stained tablecloths again. The disc rolls up and fits tightly into the neck of the bottle forming a seal that prevents any liquid from seeping out. They are convenient, easy to use and reusable. Simply rinse under the tap after use. This unique invention has become a must for those who enjoy wine - great for home and essential for pouring at wine tastings. Pack of 5.MacPhee's have a great range of wine aerators and pourers.