It should be noted that:

The first is that heating for a long time may cause a short circuit. If the brand doesn't pass, the second is that the coaster has self-explosion, so you must pay attention when buying it.

Constant temperature coasters are very safe in preventing contact with live parts, input power and current, heating, leakage current and electrical strength at working temperature, moisture-proof, abnormal operation, stability and mechanical danger, mechanical strength, structure, heat resistance and flame retardancy.

The constant temperature coasters produced by regular manufacturers will not leak electricity during use, and will not be damaged even if sprinkled with a little water, and will not cause electric shock.

But be careful, even if the coaster is warm, don't use it directly as a hand warmer. It's still very hot to touch the coaster directly with your hands.

Usually, the constant temperature coaster shows a temperature of 55 degrees, but in fact, when the cup is heated to 55 degrees, the water in the cup is about 37℃-45℃. Water at this temperature is very suitable for human body to drink, which can promote cell metabolism, improve immunity, relieve constipation, promote human growth and development, and promote the healing of body surface wounds.

In addition, because the human esophageal wall is composed of mucous membranes, it is very delicate and can only tolerate the highest dietary temperature of 50℃-60℃. Above this temperature, the mucosa of the esophagus will be burned, so drinking warm water is more suitable for protecting the esophagus.