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How to buy plastic straws

First, "see" - depends on the outer tube of the straw with "QS" logo, the tube with or without black spots or broken bubbles are the same color, try not to choose bright colors of the straw.
Followed by "smell" - in the straw is not exposed to drink before the smell of a pungent odor, especially in the case of hot water when the surface with or without the distribution of bad smell.
The third is "pinch" - if you pinch the straw on the flat or no elastic or cracking, it shows that the straw is made of relatively poor quality materials, these are inferior products.

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