Yeast starter kit

10 $ in aliexpress https://s.click.aliexpress.com/e/_DlKMAcz
9 $ in amazon https://amzn.to/4eQ3xv3
Kikcoin Sourdough Starter Kit, 35oz Large Capacity Sourdough Starter Jar with Date Marked Feeding Band, Thermometer, Stainless Steel Lid, Measuring Spoons, Reusable Sourdough Bread Baking Supplies