The Trudeau Porcelain Butter Boat has a dual chamber design that will keep butter fresh and soft for weeks without refrigeration. Simply fill the base up to the fill line with water and insert butter container. The evaporative properties of water are the key to keep butter at the perfect temperature and make it easily spreadable. Made from high-quality glazed porcelain, it looks great in the kitchen or on the table and compliments any decor. Dishwasher safe. From Trudeau, a trusted brand and global leader in innovative kitchen product design for over 125 years.