Is Coca-Cola real or fake?

According to your description, it should not be the case. If you look carefully, there will be a small triangle mark on both cans with the word steel or aluminum inside. The colors of steel cans and aluminum cans are different. The weight is also different. Just weigh the empty can after drinking it and you will know. Coca-Cola cannot be copied casually. The gas problem should be related to the product batch. This is all my speculation, haha