Expect to double up on the tea bags for a 10-12 oz cup if you are so inclined. Furthermore, Twinings Vanilla Chai is a tea that really must be supplemented with milk and sweetener, or it's just rather odd. Of course, for traditional chai, that is exactly what you will want to do. But for comparison purposes here, I have brewed all the tea bag chais in water with no sweeteners. Perhaps that is unfair to Twinings Vanilla Chai. You be the judge.
Troy the Chai-Direct Chai Tasting Guy