A factory tour is a free tour sponsore by the company providing the tour to promote their products, contrary to an escorted tour or a self-guided tour where there usually is a substantial cost involved because they are businesses within themselves. These manufacturing companies offering these factory tours think of it as public relations. While most factory tours below are free, some do charge a small fee. Most factory tours have a definite daily schedule, while some require an appointment (especially for large groups). Sometimes factory tours are associated with or an extension of a museum. Many times, at the conclusion of a factory tour, the company even gives away samples of their products or has reduced "factory prices".