The bulk food packaging in the supermarket is packaged by aluminum clip or plastic clip. We can just tear open the plastic and use the plastic bags as garbage bags.
Many people usually tear the bag which have the aluminum clip. In fact, there is an easy way to open the bag.
As long as we find the aluminum clip, and then pull hard on both sides, we can easily open it, so that the bag will not be torn.
In this way, we can also use the bags to hold other things or as garbage bags.