Generally speaking, wine with metal bottle caps is very cheap, and most of the wine with good quality is made of cork. Cork is a natural product made of oak bark, which has excellent elasticity and resilience and can be completely sealed after being compressed into bottles. However, when it is dry, the elasticity will be reduced due to shrinkage, which is why the wine must be placed horizontally in order to keep the cork moist to preserve the wine. Now, there are also artificial compressed broken corks to replace natural corks, but generally speaking, most high-priced wines use natural corks. Because the life of cork is about 30 years, it can preserve wine with a long age.

Traditional wine packaging used cork, first oak stopper, and then gradually developed into synthetic stopper, 1+ 1 stopper, and then screw stopper appeared.

At the end of 2003, the international Wine magazine (Wine

Internatinal) held a wine tasting conference, asking wine tasting experts to choose the best way to seal wine. It was found that the wine sealed with screw bottle cap was better than that sealed with cork.

The magazine invited many wine critics to taste 40 kinds of wines, and each wine has 40 sealing forms: natural cork, synthetic cork, screw bottle cap and ordinary bottle cap. Sealed, anti-cracking, corrosion-resistant, drillable when opening a bottle, no odor, anti-high pressure explosion.