Each of the Champagne Stoppers is made of tough stainless steel material, and rust-resistant The Champagne Stoppers are great for barware accessory, and an essential addition for your kitchen and home bar The Champagne Stoppers are easy to clean and can be reused, to keep your unfinished champagne or wine sealed The wine stopper clamps are tight to an unfinished bottle of wine(especially champagne) to better maintain flavor and freshness You can simply pull the stopper onto the bottle to form a tight vacuum seal, and push the button to remove it, very convenient to use