1. First of all, pay attention to whether the lid is appropriate, we know that the Ceramic cup lid can make water not so quickly cool, if the cup cover is not suitable, such words may be defective, will also affect the future use.
2. Listen to the sound, finger light bombs, if issued crisp, sweet voice, then this porcelain tire fine dense solid, if the voice hoarse, then for inferior porcelain, not buy.
3. Drink water when the mouth will touch the cup wall, so the top of the outer side of the cup, that is, the mouth contact with the design, and the interior wall is best not to have patterns. Because these glaze color decoration contains traces of lead, cadmium and other heavy metals, not easy to long-term use. Have certain harm to human body.
4. Touch the surface. See whether smooth, see if there is no cracks, small holes, black spots, if like glass as smooth, the product is better.