1, packaging contrast: the packaging and printing of real Yili pure milk are clear, the fonts and patterns are not blurred, and the colors are bright. However, the packaging and printing quality of fake and inferior products is poor, and the fonts and patterns are blurred and the colors are dark. Yili pure milk is available in "SIG" and "Tetra Pak" packages. Among them, the bottom of Tetra Pak packaging adopts diagonal folding technology, which has more factory information on the side and clearly visible printing, and the quality of straws is also good. However, the bottom of "SIG" packaging adopts flat folding technology, which has less factory information on the side and fuzzy and rough printing, and the quality of straw is poor. Therefore, it is recommended to buy Yili pure milk packaged by Tetra Pak.

2. Comparison of taste: Yili pure milk packaged with "SIG" has a thin liquid, a light taste and no obvious milk flavor. The Yili pure milk packaged by Tetra Pak has a thick liquid, a strong taste and a strong milk flavor.

3, odor contrast: the real Yili pure milk will emit a faint, natural milk fragrance. Because of the nonstandard production process and the use of additives, fake and inferior products often produce pungent or unnatural taste, and some even have the taste of chemical reagents.