Safely store and serve perfectly spreadable butter with this stoneware butter keeper. Simply pack the keeper with 8 tbsp of softened butter, add cup water to the base and invert the keeper to create an airtight seal that protects the butter’s flavor and freshness. For best results, change water every three days. Each piece is handmade using a proprietary sand stoneware and finished in a signature ivory glaze. The glaze on the rim of each piece has been removed to allow the warmth of the sand clay to be highlighted. Product Dimensions: Butter Keeper: 3.6" w x 3.125" h Capacity: 4 oz butter Product Specifications: Material: Sand Stoneware Glaze: Ivory Use: Microwave safe, Dishwasher safe, Food safe