The price of this kind of cup is generally around 20, and the price tag is usually several thousand. Like many wines, the price tag is to trick fools into closing the deal if they can cover it, and to sell it for 20 if they can't cover it. There are many ways to get selenium by drinking tea. There is selenium in this selenium-enriched cup, but the amount you can absorb is a drop in the bucket, and it is actually the same whether you use it every day or not.