M-Line, Inc. - Packaging Solutions & Custom Packaging Design packaging, custom packaging, engineered packaging, packaging products, packaging boxes, packaging tape, packaging design, package design, steel strap, steel banding, plastic strap, plastic banding, packaging tools, plastic bags, gaylord boxes, liner bags, VCI packaging, pallets, crates, wood packaging, mline, m line, m-line M-Line is your custom packaging supply company, proudly serving northeast Ohio and western Pennsylvania. ISO-certified design & engineering.