Worldwide Dispensers' new ViniPlus system boasts a "greatly improved oxygen barrier" which enhances shelf life far more effectively than current designs, it claims.
The company added: "As well as its shelf life properties, the new tap offers a number of consumer convenience features. A self-closing, one handed front push button enables precise control of the direction and flow of the wine and the tear away cap around the button provides effective tamper evidence. In addition, a special valve seals the outlet after every use, preventing hang up in the spout."
Recent research from Wine Intelligence and the Wine & Spirit Trade Association has found that half of UK wine drinkers would buy bag-in-box wines for a party, but one in five said they would not buy them under any circumstances.
Most people who reject them find the packaging unappealing, though 17 per cent said they believed the wine would not be kept in good condition.