King Arthur Baking Company Classic Sourdough Storage Crock stores sourdough starter and helps keep it fresh whether placed on the countertop or in the refrigerator. Made from durable ceramic with a non-reactive glazed interior and exterior, it supports healthy fermentation without unwanted flavor interactions. The roomy 1-quart capacity offers ample space for mixing and holds enough starter to prepare several loaves of bread. With a compact footprint and sleek appearance, it fits seamlessly into any kitchen setup. Crafted from lead-, cadmium-, BPA-, and PFAS-free materials, this crock ensures worry-free storage and fermentation. This sourdough crock is microwave and dishwasher safe, and heat safe (up to 480-degrees Fahrenheit), making it easy to clean and versatile for daily use.