Why do all the hotels set the red wine askew?

Because the bottle was blocked with a cork.

The length of cork used in general wine is about 3.5-3 cm, and the length of cork used in wine with aging potential is more than 5 cm. Some wineries also print the year and winery name on the cork.

Because the cork has a certain elasticity, the wine should be placed horizontally or obliquely under the condition of 70% humidity and 12- 16 degrees, so that the cork can be in close contact with the wine liquid and keep expanding. If the vertical storage or storage environment is too dry, the cork will lose its elasticity, accelerate the oxidation and aging of wine, and make the wine decline. So in a restaurant, the sommelier opens a bottle of wine, and the first etiquette link is to let the customer check the cork. If the bottom of the cork is wet, it feels elastic and smells fragrant, which means that this bottle of wine is well preserved. If the cork has shrunk or become moldy, it means that it has not been properly preserved, so you should be extra careful when you try wine next.