New model of Genkikan 4 This is a set of 2. I used one of them once, but I'm so busy that I can't really use it, so I'm reluctantly putting it up for sale. No scratches. I bought it for 50,000 yen. You can easily make hydrogen tea with tea you can buy at convenience stores or with your own tea leaves. It's very easy to make, but the oxidation-reduction potential is significantly more negative than commercially available hydrogen water. The instructions on how to make it are also included as shown in the photos. I have kept the original box, so I will use it for shipping, so you can rest assured that it will be delivered safely. It's a great product that can be used semi-permanently as long as the bottle isn't damaged. The hydrogen tea you make has a very mild and delicious taste.