Ah, yes, the hamburger bun. The soft and gentle unsung bready-hero of America's most popular menu item. Baking them is a billion-dollar industry, but they're hardly discussed when it comes to menu items these days. Heck, it's been over a century since they were invented (history has yet to determine who first put them into use) and little has changed during that time.
However, there has been one tiny addition to the bun that has been one of the greatest advancements in a long time. It’s something so small, but has had a huge impact on the hamburger bun and a few big names who sell them.