How to get all the toothpaste out of the tube

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How to get all the toothpaste out of the tube
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A gnarled toothpaste tube, squeezed and twisted out of shape in a vain attempt to extract its remaining contents, haunts many a bathroom. But not, perhaps, for much longer

A GNARLED TOOTHPASTE tube, squeezed and twisted out of shape in a vain attempt to extract its remaining contents, haunts many a bathroom. But not, perhaps, for much longer. Colgate-Palmolive, an American consumer-goods giant, has taken up an invention by a pair of experts in super-slippery surfaces to produce toothpaste tubes that promise to deliver every last drop.

So far, ketchup-makers have yet to embrace the idea. But the health and beauty industry, where products tend to be pricier than ketchup, is interested. Mibelle Group, a Swiss producer of health-care and beauty products, employs the technology in its factories to lessen the amount of material left stuck to the insides of pipes and vessels when it is time for a clean-up. LiquiGlide’s deal with Colgate is, though, the firm’s first big break into a consumer business.

To produce their slippery pipes and containers, Drs Varanasi and Smith first impose a microscopically textured pattern on them and then apply a suitably formulated liquid. This fills the gaps in the texture, creating a surface across which gooey substances slide easily. Any risk of contamination can be eliminated by making the liquid in question from materials also employed in the product.

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