<Li> Furniture Design inspired Pretzel Chair designed in 1952 by George Nelson . </Li> <Li> Amusement ride of the Pretzel Loop design in Roller coaster elements maximizes the g - forces on riders, increasing the "thrill element" of riding a roller coaster . On a pretzel loop, riders are upside down at the beginning, and on their backs and going backwards at the bottom . </Li> <Li> Fashion inspired sling bikini is a pretzel bathing suit design emerged in the early 1990s, as a new fashion product of Spandex . It is a bikini variant, haltered maillot that crisscrosses the front and fastens to the waistline . With the advent of the 1990s fabric known as Lycra, these bikinis first emerged and became most popular on the beaches of Europe, including Saint Tropez, Marbella, Mykonos, and Ibiza . </Li> <Li> Ecosystem ecology The "SolVin - Pretzel" because of its shape was the name given to the inflatable United Nations Global Canopy Programme's light weight research platform which is placed on top of the canopy of rainforests to study the ecology below . </Li>

Where did the shape of a pretzel come from