In a new video, the YouTube blademaster at the channel Kiwami Japan turned ordinary jello snacks into a fearsome knife.
First, the host melts down about a dozen shot-sized jello snacks in a saucepan. Then he mixes the sludge with blue food coloring and gelatin, simmers for three hours, strains it into a shallow pan and cools it in a refrigerator. When he cuts the resulting jello sheet into a floppy knife shape and dehydrates it, it became startlingly rigid—and ready to be sharpened on a series of whetstones.
On camera, the host demonstrates the jello knife’s power by slicing sheets of paper and a cucumber. Then, to complete its life cycle, he heats a fresh saucepan, snaps the jello knife in half, melts it back into a blue liquid and pours the result back into the snack containers it came in originally.