Segmentation by type classifies can liners according to the polymeric material and construction format. Polyethylene (PE) liners dominate due to their low cost and adequate barrier properties, capturing the largest share of the market. Polypropylene (PP) liners follow, offering higher temperature resistance and stiffness, making them preferred for hot‑fill processes. Polyester (PET) liners provide superior gas barrier performance, supporting premium beverage applications that demand extended shelf life. Nylon liners, though niche, are valued for exceptional puncture resistance in high‑pressure environments. Finally, Multi‑layer liners combine two or more materials to balance barrier, mechanical, and cost attributes, addressing complex packaging requirements across sectors. Each type contributes uniquely to market valuation: material cost, performance envelope, and processing compatibility dictate its adoption rate. Understanding this material‑type taxonomy is essential for stakeholders assessing competitive positioning and forecasting growth within the Can Liner market.