Promotional media, such as paper posters and digital signage, are installed in shopping malls to recommend products and services. However, it has been reported that many customers tend not to be interested in these promotional media and do not receive the information. When product information is not communicated effectively, advertisers are unable to convey the information they wish to share with customers, and customers miss the opportunity to receive valuable information. To address such issues, a lot of methods have been proposed to make people aware of the presence of media; however, there are not many methods that take into account the delivery of product information to customers. In this study, we propose Popping-Up Poster, a pin-based poster device designed to capture customer attention and convey information through dynamic shape changes. To verify the effectiveness of the proposed system, field experiments were conducted in a café, where its promotional effects were compared with those of traditional promotional media, including paper posters and digital signage. These results show that Popping-Up Poster has the potential to be more effective in recommending products and influencing customer product choices compared to conventional promotional media.