There are four ways to identify the quality of ceramic cups:
1. Whether the lid fits properly.
Ceramic LIDS keep the water from cooling down so quickly. If the LIDS don't fit properly, it could be defective and affect future use.
2. Listen to the sound.
Fingers, if a crisp, pleasant sound, then the porcelain is detailed and dense, if the voice hoarse, then for inferior porcelain, can not be bought.
3. Look at the pattern.
When you drink water, your mouth will touch the side of the cup, so there should be no pattern on the top of the outside side of the cup, where your mouth touches, and no pattern on the inside. Because these glazes contain trace amounts of lead, cadmium and other heavy metals, it is not easy to use for a long time. It is harmful to human body.
4. Touch the surface.
See if it is smooth, see if there are cracks, holes, black spots, if it is as smooth as glass, the product is better.
