Dice go way back. Some of these appear to meet today's standards for precision and fairness (all dice should have opposite sides add up to 1+sides. The d6's sides add to 7). The Greek stone d20 may be 2200 years old.

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A Brief History of Dice | Libris Arcana

Not to admit my ignorance here, or maybe to do just that, but until recently I thought the D20 had probably been invented by Gygax and company at TSR. I mean maybe it had been around before then and used by the wargamer community, but it was definitely an invention of the mid-20th century, right? Oh how wrong I was!

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Vettweiss-Froitzheim Dice Tower - Wikipedia

@dx that's a neat yet odd concept since a cup works just as well 😉
@adamhotep I generally don't use either, but I prefer dice towers to cups. They're more fun. Cups are great for games like Liar's Dice where you need to keep your roll secret, though.