Every last drop How to get all the toothpaste out of the tube
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 scrap of their contents.
In 2012 Kripa Varanasi, a professor at the Massachusetts Institute of Technology, and Dave Smith, his PhD student, set up a company called LiquiGlide to commercialise their work on making liquids flow more easily through pipes and out of containers. What caught many people’s imaginations at the time was a demonstration of how this could be used to empty a ketchup bottle without shaking it vigorously.
So far, ketchup-makers have not embraced 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 to lessen the amount of material left stuck to the insides of pipes and vessels in its factories 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.
