What material is good for Baijiu bottle stopper?

Baijiu bottle stopper is made of food grade silica gel, which is safe, harmless, colorless and tasteless, and can be used to contact food like wine.
However, if it is not a food grade silicone stopper, it can be used for a long time to seal the wine jar. Over time, the harmful and toxic chemicals emitted by the silicone stopper may be mixed in the wine, endangering human health. So it's better to use food grade silicone
In the current Baijiu industry, metal screw caps, plastic screw caps, polymer plugs, plastic coat plugs, etc. are commonly used. For these plastic caps and plugs, it is believed that after the "plasticizer" incident, the industry and liquor enterprises will have strict requirements on the plastic material. For plastic inner packaging materials in the field of Baijiu, "plasticizer" is not allowed.