The second tier of market taxonomy distinguishes stainless‑steel cans by structural type, each aligning with specific electrochemical and mechanical requirements. Standard‑pressure cylindrical cans dominate the segment, representing roughly 55 % of unit volume, because their geometry simplifies cell winding and provides predictable pressure distribution up to 10 bar. High‑pressure cylindrical cans—rated between 10 and 30 bar—account for about 30 % of production, catering to applications where energy density must be maximized without enlarging the footprint, such as in compact EV modules. Ultra‑high‑pressure cans, engineered for pressures exceeding 30 bar, occupy the remaining 15 % and are primarily deployed in aerospace and niche industrial storage where weight savings outweigh cost penalties. Within each type, sub‑variations such as flanged‑lid, welded‑seal, and seamless constructions further refine performance envelopes, influencing failure rates, manufacturing yield, and cost structures. By quantifying type‑specific output, analysts can map material consumption and forecast capacity expansions across the stainless‑steel can supply chain. These distinctions also affect recycling streams and regulatory compliance.