Here is a view of the Sanjo Showroom today. Shirokiya Shikkiten's Eto Sake Cups are on display.

Sanjo Showroom
https://www.shokunin.com/en/showroom/sanjo.html
Shirokiya Shikkiten's Eto Sake Cup
https://www.shokunin.com/en/shirokiya/sakazuki.html