LD Bottles are typically made by a process known as extrusion blow molding. In this process a tube of LD is extruded and positioned inside of a mold. Air is blown into the tube to create the molded bottle.
Bottles can be a single layer of LD, or can be made with multiple layers of LD to include postconsumer content in the middle layer of a bottle, for example. Bottles might contain a layer of polymer known as either EVOH or nylon to provide improved oxygen barrier to the contents of the bottle.