Why Do Soda Cans Have Stay-On Tabs?
Soda cans feature a familiar metal tab on the lid. This stay-on-tab opens the top easily and remains attached after use. The design seems straightforward but stems from practical solutions to past issues with can openers.
Earlier cans used tabs that detached completely, leading to widespread problems that prompted the shift to stay-on tabs.
Early Detachable Pull-Tabs
In 1962, Ermal Fraze invented the pull-tab. Inspired by forgetting a can opener at a picnic, the design allowed users to rip off a scored aluminum piece. These tabs separated fully from the can.
Problems Leading to Change
Detached tabs littered environments like beaches and parks. Their sharp edges caused injuries, including cuts to feet and risks to children and wildlife.
Invention of the Stay-On-Tab
In 1975, Daniel F. Cudzik of Reynolds Metals patented the stay-on-tab, known as the Sta-Tab. A rivet allows the tab to pivot and press open a scored panel while staying connected to the lid. It debuted on Falls City beer cans.
The stay-on-tab exists to prevent litter and reduce injury risks from discarded sharp metal. This practical evolution made it the standard design for beverage cans worldwide.