This set of high-temperature resistant glass jars is perfect for making your own yeast and sourdough starters. The sourdough jar is made of glass that can withstand high temperatures, making them safe and reliable for home use. You can use this sourdough jar set with confidence. Features -Color:Assorted Color -Material:Glass, paper, silicone, wooden - Size: 16.00X10.30X10.30cm/6.29X4.05X4.05in(jar) - Size: 24.00X2.20X0.60cm/9.43X0.86X0.24in(spatula) -This sourdough starter jar specifically designed for fermenting natural yeast and sourdough starters, useful. -Includes variety of accessories for easy use and management, this sourdough starter jar set give convenience. -This glass sealed jar is perfect for cultivating natural yeast fermentation, resulting delicious foods, very useful. -Made from glass, these containers are both safe and easy to clean. You can use with confidence, widely used. -This glass jar is designed to withstand high temperatures, making it perfect for creating your sourdough. Package list: 1 x glass jar 1 x silicone spatula 1 x temperature paper 1 x time monitor