Packaging is the most expensive aspect of brewing, representing up to two thirds of the cost of beer production. It is also one of the least forgiving steps in the brewing process. A perfect batch of beer can be ruined in nanoseconds by microorganisms on your nozzles or too much oxygen making its way into your bottles or cans. Foreign objects, like glass, can get into your product and to your consumers. Too little glue on your boxes can send your product (and profit) crashing to the ground.