1. Whether the lid is suitable.
The ceramic lid keeps the water from getting cold as quickly. If the cup lid is not suitable, it may be a defective product, which will also affect future use.
2. Listen to the sound.
If you flick your fingers, if it makes a crisp and pleasant sound, then the porcelain tire is fine and dense. If the sound is hoarse, then it is inferior porcelain and cannot be bought.
3. Look at the pattern.
When drinking water, the mouth will touch the wall of the cup, so the outer side of the cup wall is higher than the top, that is, there is no pattern where the mouth touches, and the inner wall is better without a pattern. Because these glazed decorations contain trace amounts of heavy metals such as lead and cadmium, they are not easy to use for a long time. It is harmful to human body.
4. Touch the surface.
See if it is smooth, if there are cracks, small holes, black spots, if it is smooth like glass, then the product is better.
