High transparency: N+ layers are superimposed, the packaged items will still be clearly visible, and the transparency is close to 100%. Effective water lock: the five-layer process can effectively lock water, block food oxidation, and prevent water vapor from penetrating. The water lock time is doubled, and the preservation effect is outstanding. Strong stickiness: it can be strongly pasted on various utensils, sealed fresh and clean, and prevents the invasion of bacteria and harmful substances.