Two-liter bottle

These bottles are produced from polyethylene terephthalate, also known as PET plastic, or glass using the blow molding process.

Since very few other beverages are sold in this exact quantity, the term "two-liter" in American English almost invariably refers to a soft drink bottle.

[4][5] Most modern-day two-liter bottles are one piece of PET (polyethylene terephthalate) with a base that is molded with a radial corrugation to provide strength for the bottom and the ability to stand upright.

Most early two-liters had a separate opaque base glued to the hemispherical bottom of the clear PET flask.

Used two-liter bottles see new life in a variety of uses including carpeting, boat hulls, polyester fabric, filling for jackets, sleeping bags, mattresses, pillows, recycling bins, artificial floating islands, scouring pads, and, on an increasing scale, new soft drink bottles.