Crystalline qualities of glass were very appreciated by Expressionism. Some years later. transparency became a keystone for the Modern Movement. Mies van der Rohe drew his entry for the Friedrichstrasse Competition in 1921. https://www.bekindtopets.com/mega-pick-Silbrade-Braid-Reinforced-Silicone-Tubing-1-4-ID-x-520-OD-x-1-hot-grab/