What's a Snap Fit?

You may not know a snap fit by its name, but they're all around us from pen caps to some water bottle caps.
Inside Science Contributor

(Inside Science) -- Ever heard of a snap fit? It's kind of a fancy way to describe two pieces of (usually) plastic that fit or snap together. If you take look around your house, you'll probably see snap fits everywhere. From pen caps to zip-close bags, the world is full of everyday examples of snap fits. Yet as universal and abundant as the snap fit is, the mechanics of how it works hadn't been studied too intensely. But researchers in Japan decided to dive into the physics of snap fits, with some unexpected results.