(BBC) - A new wine cork that screws into the bottle is being unveiled. But why is there still so much snobbery in the battle between traditional cork and screw-top?

The sound is unmistakeable.

A scientist might talk about the explosive pop of a wine cork in terms of pressure or elasticity.

But for wine lovers, the distinctive creak and pop means something good is happening. It triggers associations - social intimacy, relaxation, nuanced aromas, celebration - that go far beyond just a slug of alcohol.

The unveiling this week of a new style of cork raises the question of why the traditional kind continues to dominate much of the wine world.

The Helix is opened with just a twist of the hand. No corkscrew is necessary as the top of the bottle has a thread inside.

The glass bottle and cork combination for wine is thought to have started in the 17th Century. But newer materials exist today that some argue are better suited for sealing a bottle than cork.

Screw caps and plastic corks have been embraced by producers fed up with wine becoming "corked" - the unpleasant musty taste, likened to wet dog, which is caused by tainted cork.