World’s most awesome knife is made of water.

Left Field, Tech

I am not sure if it actually qualifies as a knife but it sure cuts better than the steel in my kitchen.  Company Paprima sells a product called an Ultra High-Pressure (UHP) Water Jet.  Marketed for food cutting applications, this puppy blasts through whatever delicious and unfortunate substance that dares face down the diamond nozzle as it shoots regular drinking water at 3 times the speed of sound.

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