Many foods and drinks that we come into contact with every day are packaged in cans. Like cola, canned fish with tomato sauce, canned fruit, eight-treasure porridge and so on, which we usually drink, all are packed in this way. Moreover, in the emerging take-away industry, some merchants also use cans for packaging, so that no one will touch the food during transportation, which is hygienic and not easy to spill. This kind of packaging will make customers feel very at ease about the hygiene of food. But this kind of package also has a big disadvantage, that is, it will accidentally scratch your hand when opening it. Like the cola we usually drink, this kind of can is relatively easy to open. One is that you need to take the tab down along the print. Generally, you need to pull it skillfully, otherwise it is easy to break the tab. There is also a push-down pull ring, which is relatively simple. Just pull the pull ring up, and the lower part of the pull ring will push down the place with the mark on the bottle mouth, which will naturally open. If you use a straw to drink coke, just turn the pull ring to the opening and insert the straw into the pull ring. When opening a can of eight-treasure porridge, you need to hold the bottle of eight-treasure porridge with one hand, put the index finger of the other hand into the pull ring, hold the position below the pull ring with your thumb, and then pull the index finger properly. After slowly pulling out an opening, start to adjust the direction of force and slowly pull it back along the strength. Of course, you must pay attention to not touching the edge of the lid with your fingers. Most of the cans are made of aluminum or tinplate, so they are quite sharp and easy to cut your fingers. Be sure to pay attention. Then open the canned fish with tomato sauce, because the canned fish with tomato sauce belongs to flat round packaging, and the lid area is relatively large when opening, so it is difficult to open. Generally, other tools are needed to open the can. After an opening is opened with the pull ring, the can is slowly opened along the edge with a kitchen knife or scissors, and the lid is pulled down with the help of the tool. If you pull it hard, it will break the pull ring and make it impossible to open it, so it takes methods and skills to open different cans.