- in size (it is between 14 and 15 centimeters, they are still all glasses of water);
- in shape: the "ball" in the center has differences, see detail photos;
- thickness, which makes the color of the lenses slightly different from each other.
To note: one of the glasses has a chip on the edge of the chalice, see last photo.
Another set of 18 glasses of the same type is sold separately.