Mrs. Anderson's Better Butter Keeper stores butter to keep it fresh, soft, and spreadable for up to 30 days without refrigeration. Butter can be spread effortlessly without tearing bread or leaving cold, hard butter clumps behind! Decorative and functional, it's perfect for everyday dining as well as entertaining. Sized perfectly to hold 1 (4-ounce) butter stick. Simply pack butter into the bell-shaped cradle, add fresh water to the base, and place cradle into the base facing downward. When closed, butter comes in contact with the water to create an airtight seal to keep butter fresh and spreadable. Change out water every 3 days. Made from natural ceramic earthenware with a scratch-free glaze, Mrs. Anderson's Better Butter Keeper is sturdy and durable. Microwave safe to gently soften harder butter and dishwasher safe for easy cleanup.