I bet you didn't think that drinking wine could get any better. Think again! On the Rocks introduces an absolutely stunning accessory to any bar or bottle. The stoppers have a large agate slice approximately 3-3.5 inches on acrylic base. They are a great birthday gift and can also fit various liquor bottles based on the size of the bottle opening. You can write on them with a chalk marker and it will wipe off! Write a birthday message, the date the bottle was opened or wine category for a tasting party.