The Yogurt.bg Ryazhenka Starter Culture Powder is a 10L package of 10 sachets of probiotic Bulgarian yogurt starter. This product is suitable for those with milk allergies and is designed with various food specifications in mind such as being dye-free, organic, vegetarian, and gluten-free. The lyophilized starter culture powder is guaranteed to last up to 04.2027 and each serving size is 1LITER, making it a convenient and versatile option for those looking to create homemade Bulgarian yogurt.