With regular WLP vials a brand new vial has 100 billion cells. How many does a Brett (brett only) vial have? I ask because the vial doesn't have the regular yeast cake in the bottom of the vial like their regular sacch. strains do. Their packaging date is four months before the best by date for sacch. strains. What is it with brett vials? It clearly isn't 4 months because I just picked up a vial that has a best before date of 12/08/11.