Typically, pasteurization is performed with a benchtop pasteurization system in a stove-top immersion bath. Bottles are immersed in boiling water and held at temperature for a given amount of time. The problem is while the immersion process is inexpensive, it is neither accurate nor controlled, and the benchtop equipment can be expensive and complicated to install and operate. A solution is the laboratory glassware washer which simulates tunnel washer conditions— i.e. the bottles are sprayed with water at a certain temperature.