Although it is new and unused, it has aged. I won it in a giveaway, but I never used it. Please be careful not to swallow the stones by mistake. Please read the precautions before use. The tumbler is lightweight. How about using it when you want to relax and drink alone during the hot season? #️⃣Sake cup #️⃣Tumbler #️⃣Guinomi (small sake cup)