Hi-cone packaging, also known as Hi-cone carrier, six pack rings, or six pack yokes, are a set of connected plastic rings that are used in multi-packs of beverage, particularly six packs of beverage cans. Single products packaged together make a multiple unit, such as beverages and small bags of chips. The six pack rings in most common use today are the descendants of an original design by ITW Hi-Cone, which first introduced them in St. Louis, Missouri in the summer of 1960. Within 10 years, plastic rings had completely replaced the paper and metal based holders then common in the market. Today, several other manufacturers continue to produce six pack rings. As interest in multi-packs has continued to grow, other variations, including paperboard baskets and HDPE plastic can carriers, have grown in popularity, providing an alternative to conventional six pack rings.