Why does unopened liquor leak?

The bottle cap is not tightly sealed, or there are small cracks in the bottle cap or bottle body. According to the query of wine network, the leakage of unopened liquor is because the bottle cap is not tightly sealed, or the bottle cap or bottle body has tiny cracks. Some white spirits are in bulk when they leave the factory, but they are not found when they are bought back. After a period of time, the liquor will gradually evaporate and decrease, or the bottle body will crack during transportation, and the liquor will decrease after a long time.