this is incredibly niche but i'm reading an isekai set around the Second Schleswig War and I am completely thrown because they're drinking coffee out of mugs, the modern mug is an invention of WWII.
people before drank coffee in wide brimmed or demitasse half-cups.
If you drank Turkish concentrated coffee, you drank it out of a demitasse cup
if you drank a weaker brew with milk and sugar, you drank it out of a wide brim cup so you could enjoy the aroma with a pot sitting in hot water to keep it hot
Mugs were to keep it warm for soldiers
Rev. Poppy Haze ð“…‹
Mike Prior-Jones