Three of our sourdough starters—the two white bags and the purple bag—are identical in quality, ingredients, and performance. The only difference is the packaging design. We offer multiple style options so retailers can choose the look that best fits their store aesthetic and customer base. No matter which design you select, the product inside is the same premium, 170+ year old San-Francisco-style sourdough culture you know and love. At Rustic Roots, we do one thing and one thing only. By limiting what we do, our focus stays on what we do best, sourdough starter! Made from organic, non GMO flour & filtered water. That's it. Ingredients: Organic Flour, Mineralized Water We still believe in the baker's dozen. Order a case of 12 and we will send you 13 ALWAYS. We use a 170+ year old starter for a tried and true, consistent starter. Most customers say they can begin to activate their starter on a Friday and it's ready to use Monday afternoon! San Francisco-style sourdough is known for its crisp, chewy crust and tangy, complex flavor. This signature taste comes from the unique wild yeast and bacteria in the region, particularly Lactobacillus sanfranciscensis, which thrives in the cool, foggy climate. With a long fermentation process, it develops a deep, slightly sour flavor and a soft, airy crumb, making it a beloved classic among bread enthusiasts.