With the DropStop you will never get stained tablecloths again. Insert the disc in the bottle where it fits tightly against the side of the bottle forming a seal which prevents any liquid from seeping out and the escape of any drops. The product offers the following features: 100% effective - Prevents drops from happening Convenient and easy to use - just roll up the DropStop and slip it into the neck of the bottle Reusable - After use simply rinse under the tap. DropStop can be used for several years