Fogging soda is a kind of beverage with very soft taste and a lot of foam. Its manufacturing method is to inject a large amount of gas (usually carbon dioxide) into the water when it leaves the factory, so as to produce intricate bubbles in the water, also known as "fog sleep". The high air content makes the foggy bubble water present a certain sour taste, which is more fresh and refreshing, and has a weak stimulation similar to carbonated drinks. In addition, fog sleep bubble water generally does not add pigments, preservatives and other ingredients, which is relatively healthier and is loved by more and more people.