Safe Instant Yeast is one of the top selling yeasts in the world Comes in a large, 16-ounce (1 Pound) vacuum-packed bag Store in an airtight container; for 6 months at room temperature or in the fridge; or for a year or longer in your freezer Fast acting and long lasting Saf Instant Yeast is one of the top selling yeasts in the world Comes in a large, 16-ounce (1 Pound) vacuum-packed bag Store in an airtight container; for 6 months at room temperature or in the fridge; or for a year or longer in your freezer Fast acting and long lasting Saf Instant Yeast is one of the top selling yeasts in the world Comes in a large, 16-ounce (1 Pound) vacuum-packed bag Store in an airtight container; for 6 months at room temperature or in the fridge; or for a year or longer in your freezer Fast acting and long lasting