How to distinguish the quality of paper cups

Generally, when purchasing, it mainly relies on the method of observing the appearance characteristics to identify the paper cup, and a good paper cup will generally undergo the following tests and quality inspections:
Functional test: Test whether the paper cup can hold liquids, such as water.
Performance test: test whether the paper of the paper cup is thick enough and not easy to deform.
Stress test (load test): whether the liquid will go bad when the paper cup is filled
Recoverability test: whether the paper cup can be restored to its original shape after filling it and pouring it out
Strength test: whether the paper cup will soften and damage the liquid after a period of time.
Appearance test: whether the appearance of the paper cup is beautiful, whether the pattern is beautiful
Ease of use test: whether the paper cup feels good when used, whether the taste is good, and whether it will be prickly.
Safety test: After filling the cup with water and picking it up, whether the cup will deform and spill the liquid on the user.

When customers order, paper cups distinguish common sense
When shopping for disposable cups, pay attention to the following:
First, it is necessary to see that the product packaging should indicate the name of the manufacturer, QS production license and number, the address of the manufacturer, the product implementation standard, the production date, the validity period and other information. It's best not to buy the packaging that is too inferior and the printing is too rough.
Second, you should choose a product with a full shape, no wrinkles, a certain thickness, and not easy to deform, if the cup is too soft or the cup is easy to break when torn off, most of them are unqualified products.
Third, smell whether there is a peculiar smell, if you open the paper cup packaging, it smells great, mostly due to the use of inferior toxic ink by the manufacturer.
Fourth, don't covet paper cups that are too white, because paper cups that are too white are likely to have fluorescent substances added. It is not easy to be decomposed and eliminated, and the accumulation in the body will affect the normal development and growth of cells, and in serious cases, it will cause cell mutation, weaken immunity, and endanger human health. Therefore, experts suggest: paper cups, or lighter color is better.