This study contributes to the theoretical understanding of the impact of packaging in marketing, and confirms the importance of perceived instrumentality, aesthetics, and symbolism in this process. This study examined two types of packaging used by a firm that makes chilled meals. One package had a transparent cover showing the food inside and the other had an opaque wrapper showing a picture of the food. Sales for the product with the transparent cover were 30% lower than for the same product packaged in the opaque wrapper. An experimental study examined the effects of packaging on buying intentions. Supermarket shoppers (n ¼ 100) were shown the same product in one of the two packages and answered a survey about the mediating variables: perceived instrumentality, aesthetics, and symbolism, and the dependent variable, purchase intentions. As predicted, participants expressed more interest in buying the product with the opaque packaging. In addition, the transparent packaging was perceived as more instrumental, less aesthetic, and less symbolic of quality than opaque packaging. Perceived aesthetics and symbolism, but not instrumentality, were documented to mediate this process. Analyzing packaging using the instrumentality, aesthetics, and symbolism model can help marketers and designers develop more effective packaging for various products, contexts, and consumer groups. The study views packaging as a critical marketing tool and not merely a logistic tool, and identifies one psychological mechanism that underlies the impact of packaging on purchase intentions.