When using Norton Tommaline hydrogen-rich water cup for the first time, firstly, pay attention to soak the cup body and the hydrogen core containing Tommaline stone with warm water for about 5 minutes. Then connect the hydrogen core to the cup, and you can fill the drinking water. However, we need to pay attention to two things. First, don't pour boiling water directly into it, because the cup is made of glass, and it is easy to crack when heated unevenly. Second, the cup should not be filled with too much water, and a certain space should be reserved, accounting for about 15-20% of the cup volume, because hydrogen nuclei will produce a certain amount of hydrogen when they contact water, which will cause pressure on the cup; In addition, a friend reminded me that it is best not to drink it immediately after receiving water. The best effect is to let it stand for 15 minutes, because the hydrogen content in water will reach the highest. I hope it helps you, thank you!