Okay, you got me. You can’t really turn a coke can into cardboard but you can destroy it’s structure to a point where it rips apart like paper. Better yet, you can do this with a drop of melted gallium and a little bit of scratching.
Check out the video below to watch it happen!
Want to try this at home? Gallium is fairly safe as long as you don’t let it touch your skin or swallow it. Just be careful of pets in the area as gallium can easily splash when in melted form. You can buy gallium from GalliumSource. Have fun!