This product is a set of 10 glasses inspired by the planets of the solar system. Starting with the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto are all designed with colors and patterns that match the image of the planet.
Furthermore, the glass of the "Sun" is larger than the others , and strictly speaking, "Pluto", which is defined as a "dwarf planet", is made a little smaller.
By the way, a recent study published in Science found that up to half of the water on Earth existed before the sun was born. In response to this, the product introduction page of the glass set says as follows.
"You should try drinking" primitive water "in a glass of the solar system."