The story
From cupping + glass. Compare Middle English cuppinge cuppe (“cupping glass”, literally “cupping cup”).
Etymology from Wiktionary, CC BY-SA 4.0.
cupping glass
Today it means: A glass vessel used in cupping. Full definition →
Today it means: A glass vessel used in cupping. Full definition →
From cupping + glass. Compare Middle English cuppinge cuppe (“cupping glass”, literally “cupping cup”).
Etymology from Wiktionary, CC BY-SA 4.0.