This is a cup made of fluorite glass. The bubbles are also used as part of the design, and you can see the advanced manufacturing techniques. Top outer diameter: 70mm, Body diameter: 78mm, Height: 78mm As you can see from the photos, the glass is thick. Brand new, unopened, taken out of the box for photography. Although I haven't confirmed it, it seems to have a phosphorescent effect. Please refer to the instructions.