PepsiCo introduced the first two-liter sized soft drink bottle in 1970. Motivated by
market research conducted by new marketing vice president
John Sculley (who would later be known for heading
Apple Inc. from 1983 to 1993), the bottle and the method of its production were designed by a team led by
Nathaniel Wyeth of
DuPont, who received the patent in 1973. In 1985, a three-liter bottle appeared on supermarket shelves. The design is still used to this day by some bottlers. 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. This base had a coaxial corrugation and drain holes. == Recycling ==