Biophysicist Daniel Perlman, of Brandeis University, Massachusetts, spent three years studying how wine flowed across bottles’ lips in a bid to create the problem-solving serving vessel.
He said: “I wanted to change the wine bottle itself. I didn’t want there to be the additional cost or inconvenience of buying an accessory.”
Perlman’s drip-free bottle features a 2mm groove cut into the glass just under the bottle’s lip, preventing droplets of wine from running down its neck after a glass has been poured.
The ‘eureka’ moment came when Perlman noticed streams of wine tended to curl backwards over the lip and run down the side of the bottle – due to glass’s hydrophilic (water-attracting) nature.
For a drop of wine to cross the groove, it would have to travel up the inside of the groove – against gravity, when the glass is held at a pouring angle. Instead, it drips back into the glass.