First, clean. Sometimes it needs to be used to grab tea, but there are bacteria on the hand, so it's a little unclean. Moreover, if the tea leaves float in the cup at will, it's not very clean. You can only drink tea in a triangle bag without pushing it open. Drinking tea is easy and hygienic.
Second, convenience. Some people who like to drink tea will take tea with them. If they take the whole box of tea, it may not be so convenient. If you use triangle bags to make tea, you can take a bag. This convenience makes its application more extensive.
Third, it's easy. When you don't want to drink it, just take it out and make tea in a triangle bag and throw it away. You don't need to clean the tea cup anymore. It's simple and easy
