Hummingbird Butter Crock - White. *Keeps butter soft, fresh, and spreadable for up to 1 month! *High quality porcelain and glazing results in a non-toxic, food safe and dishwasher safe product. *Fill Top of the Butter Crock with 1 stick of butter (1/2 Cup Butter) and base with 1/2 Cup of Water. When the top of the butter crock is place onto the base the water creates an airtight seal keeping your butter fresh for up to 1 month (change water every 2-3 days. *Measuring 4″ in diameter and 4 1/8″ in Height. *Attractive Hummingbird design. Available in a variety of colors. Dishwasher Safe.