DURABLE PORCELAIN – This butter keeper crocks are made of porcelain, which is chip-resistant and more sturdy than stoneware ADEQUATE CAPACITY - This french butter crock holds about 6.5 oz of soft butter; the butter needs to touch the sides with no spaces or gaps; it is practical for your family; get 2 units if you have a big family WOOD KNOB LID - The natural wood knob on the top that can stay cute and give your kitchen a natural style LEAVE AWAY FROM FRIDGE - The water makes an airtight seal between lid and crock, that will keep your butter soft and spreadable for up to 30 days - without refrigeration! Please remember to change water each day or every 2-3 days TIPS - Adding a little salt or vinegar to the water is helpful to keep fresh, while it doesn't affect the taste of the butter either; the butter container works best with real butter instead of margarine; clarified butter and whipped butter are not recommended to keep in this butter crock DOWAN Butter Crock for Counter, French Butter Keeper Crock with Water, Soft White