Pinzon White Ceramic Butter Keeper [Amazon Frustration-Free Packaging] Crock keeps butter fresh and spreadable for 30 days without refrigeration Constructed of glazed ceramic; classic French beurrier (butter crock) style Pack soft butter into lid and add cold water to base; water seals out air Dishwasher safe Measures approximately 4-1/2 inches high by 4 inches in diameter; imported; Ships in Certified Frustration-Free Packaging