Look: When we get a mug, the first thing to look at is its appearance, its texture. A good mug has a smooth surface glaze, uniform color, and no deformation of the cup mouth. Then it depends on whether the handle of the cup is installed upright. If it is skewed, it means that the cup is a defective product, and there should be no glaze shrinkage at the connection with the cup body. If it does, it means that the workmanship of the cup is not fine enough. We can also point the cup at the sun, and a good mug should have a certain degree of light transmission.
Listen: To listen to the sound of the mug, we can flick the body of the mug with our fingers, a good mug will make a crisp clanging sound, if the sound is not crisp, it can be judged that the mug is made of mixed materials. Similarly, we need to listen to the sound at the junction of the lid and the body of the cup. If the sound is crisp and has a small echo, it means that the quality of the cup is good.
Touch: You should touch the cup body with your hand to feel whether the cup body is smooth, without pinholes and flaws, indicating that the quality of the cup is very good. It should also be noted that the bottom of the cup cannot be stuck to the board due to improper operation of the glazing process.