The Balci Premium Sourdough Starter Jar Kit includes a 40 oz capacity round jar with a clear glass design and a silicone lid. The kit also includes a thermometer for precise fermentation monitoring. Made from high-quality silicone and glass materials, this starter jar kit is perfect for home baking enthusiasts looking to store and cultivate their sourdough starter in a convenient and reliable container. With its sleek design and practical features, this product is a must-have for any kitchen.