washing-glass-jars Published February 9, 2012 at 640 × 480 in Raw Milk Contamination? These are glass jars just washed in a commercial dishwasher. The device to the left is used to filter and pour the milk into the jars. These are glass jars just washed in a commercial dishwasher. The device to the left is used to filter and pour the milk into the jars.