How to Put Toothpaste Back Into Tube Machine
Inventor Joel Hartlaub may come up with clever solutions for everyday problems on a daily basis, but one that has been on the back of his mind is finding a way to put extra toothpaste back into the tube. So, he attempted to build a handheld device that would allow him to do just that, and let’s just say the result was inspired by Back to the Future, complete with a flux capacitor. Read more to see it all come together.

How does it work? Well, it uses a vacuum chamber and a vacuum pump to manipulate the pressure inside the toothpaste tube. If the pressure inside the tube is higher than the air around it, the device pulls the toothpaste back into the tube. Now if the air pressure around the tube is greater, the toothpaste can be quickly dispensed across multiple toothbrushes in seconds.

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