Umami Mart Registry

We love to use these Hard Strong Usurai Circle tumblers as double rocks glasses, but you can enjoy them for however you wish! These glasses use the same Platinum Hard Strong tech as our best-sellers Usurai Thin Rocks glasses and Fino Stack Glasses. Usurai is becoming a household name, and this is why! Join the craze.

Testimony by an Umami Mart customer:

“I dropped a Hard Strong glass on my granite counter top, then it bounced into my steel sink and nothing happened! I saw it with my own eyes in slow motion, sure it was going to shatter during the tumble. These are truly Hard Strong!”

Read about our visit to the Toyo-Sasaki Glass factory in Chiba, Japan.


  • Use for: Water, beer, juice
  • Capacity: 11 oz
  • Dimensions: 3"D x 3"H
  • Material: Glass
  • Made in Japan

*This testimonial was given in March 2014, in regards to the Striped Double Rocks glass, which has the HS Platinum grade protection. Glassware breakage is inevitable but the extra HS coating (plus good care and a little luck) helps to prevent it when possible. Read more about the Hard Strong technology here.