These bookmarks have a long-lasting smell that really makes reading fun. Ideal for classroom rewards, each one smells like cola. Whether you're looking to help kids reach reading goals or hoping to find a fun way to incentivize good behavior, the idea of receiving one of these scented bookmarks will keep students on track and motivated. Paper. (2 dozen per unit) 2" x 6" For best results, scratch top of bookmark to release scent.