This chapter deals with the central interface of nanotechnology and smart packaging as an economically strategic solution to the growing world problem of packaging waste. It introduces the fundamental concepts of smart packaging, that is, active, intelligent, and bio-based and elaborates on the key applications including freshness tracking, spoilage warning, and anti-counterfeiting. Due emphasis is laid on nanomaterials including nanoclays, nanosilver, and nanocellulose, and their roles to enhance mechanical properties, barrier properties, and shelf life. It covers major waste reduction methodologies enabled by smart packaging solutions, including material reduction, biodegradation, and reduction of food spoilage. There are practical applications described within food, pharma, and logistics industries to demonstrate actual use and quantifiable impact. Main constraining factors including regulatory uncertainty, toxicity of the material, and business case feasibility of deployment are addressed. Lastly, the chapter describes on prospective ways through which nanotechnology converges with artificial intelligence, Internet of Things (IoT), and blockchain technologies to drive circularity in packaging systems. In fueling the frontiers of intelligent nanotechnology-based packaging, the chapter brings attention to its transformative ability to avoid waste and impact eco-friendly material development within the circular economy context.