1. Logo and trademark: whether it is a well-known manufacturer, or whether the company has a special trademark, and whether it supports barcodes (one of the criteria for entering the mall).

2. The appearance should be smooth, transparent and beautiful, without cracks, scratches or dirt; the cup body should be smooth, without burrs that damage the skin; there should be no bubbles or stains inside the cup; The oil prints and handwriting on the body should be clear and beautiful.

3. The standard capacity is 300ml, and other capacities are 260ml and 360ml, with a tolerance of ±5.

4. Sealing performance means whether it is leak-proof: after the cup lid is tightened, shake the drinking cup significantly. The cup will be in any state and the liquid in the cup will not leak.

5. Pour hot water into the cup lid and inside the cup and smell it with your nose to see if there is any odor.

6. Sealing rings and silicone sealing ring parts that come into contact with drinking water will not become sticky after being immersed in boiling water, and there should be no significant change in appearance.

7. Matching of cup lid and cup body: When the cup lid and cup body are screwed together, they should rotate freely, open and close flexibly, and there should be no slipping.

8. Resistance to sudden changes in temperature: when boiling water is poured into it, there should be no leakage, cracks, damage or other defects that would affect its use.

9. Filter: The size is suitable for the cup body, it will not slide down, and the thickness meets the standard and is not easy to bend.

10. Packaging: beautiful appearance, carton is the cheapest, slightly better are handbags, gift boxes, portable gift boxes, and the best are mahogany boxes plus handbags.

The above is an introduction to what to pay attention to when purchasing glass cups. Through the above, I believe everyone has an understanding. I hope it will be useful to everyone.