This yeast that comes in a glass jar is of great quality. I have noticed that it makes my breads and pastries rise evenly and fluffy. The glass container is an excellent presentation, as it helps to keep the freshness of the product for longer. In addition, it is easy to store and reusable, which seems to me a plus. Overall, I am very happy with the results I have obtained with this yeast. I will definitely continue to use it for my recipes.