Simply close up your glasses and slide them over the side tab. The bowl provides ample room store you eyeglass case, remote or other items you wish to keep handy. This works best with narrow frames / straighter temples like those pictured. The v2 model has deeper cutouts to hopefully better accommodate larger frames and more bent temples.

The base and top opening are 100mm (~4 inches) in diameter, and the bowl is 132mm in diameter at its widest point.

I printed at 0.20mm layer height, 2 perimeters and 10% infill. Settings are not critical so I would use the settings that give you the desired balance of speed and layer thickness.