In one interpretation, the chalice is a symbol of religion freedom from the impositions of doctrine by a hierarchy and openness to participation by all; the flame is interpreted as a memorial to those throughout history who sacrificed their lives for the cause of religious liberty.
Today, most processors use safe methods to remove caffeine. A few different techniques are available, and understanding them may help allay your concerns about coffee contaminants. Coffee beans are decaffeinated by softening the beans with water and using a substance to extract the caffeine. Water alone cannot be used because it strips away too much of the flavor. The goal is to extract the caffeine with minimal loss of flavor.
Coffee drinkers may find that they can drink regular coffee but not decaf because of the higher acidity in decaf coffee. Too much acidity causes health problems that include heartburn, ulcers, inflammatory bowel conditions, osteoporosis, and urinary tract inflammations.