This is a wind-up.
Half of an egg shell is spherical anyway, the half which goes into the cup.
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FeralCatMan Long ads need comments sections, Thu 29 Jan 2026, 21:43,
Reply)
You could just make an inverted eggcup that presents an apparently spherical egg.
A pretty dastardly trick to play on someone though.
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brb Monkhouse Stampede, Thu 29 Jan 2026, 23:36,
Reply)
The narrowing of the egg varies quite a bit though.
If you really want to mess with people's heads:-
i Inject a flavour into an egg and seal before boiling (allow to diffuse).
ii Watch the cognitive dissonance as they tuck into a cherry flavour egg.
iii Run away giggling.
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FeralCatMan Long ads need comments sections, Fri 30 Jan 2026, 0:21,
Reply)
It's not a wind up. A normal egg isn’t spherical at either end - it’s an ovoid with continuously changing curvature. Even the rounder end isn’t a hemisphere, which is why standard egg cups rely on friction rather than geometric fit. That's by the by though - I'm making an egg cup that will fit a spherical egg perfectly, as my (now rotted) round egg does not fit in a 'normal' egg cup (as demonstrated by my tests). Pointless - probably. A wind up - absolutely not.
(, Fri 30 Jan 2026, 7:59, Reply)
Spherical enough was what I meant.
You've obviously got more and better data than me though.
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FeralCatMan Long ads need comments sections, Fri 30 Jan 2026, 14:52,
Reply)
Thank you. I conducted my exhaustive experiments on 2 normal egg cups, although one was a double egg cup, so really 3.
(, Fri 30 Jan 2026, 15:44, Reply)