<P> In 1965, Frito - Lay merged with the Pepsi - Cola Company to form PepsiCo, Inc . A new formulation of chip was introduced in 1991 that was crisper and kept fresher longer . Shortly thereafter, the company introduced the "Wavy Lays" products to grocery shelves . In the mid to late 1990s, Lay's introduced a lower calorie baked version and a variety that was completely fat - free (Lay's WOW chips containing the fat substitute olestra). </P> <P> In the 2000s, kettle - cooked brands appeared as did a processed version called Lay's Stax that was intended to compete with Pringles, and the company began introducing a variety of additional flavor variations . </P> <P> Frito - Lay products currently control 59% of the United States savory snack - food market . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2014) (Learn how and when to remove this template message) </Td> </Tr> </Table>

Where do the potatoes for lays come from