I found this nice web page, the Virtual Lavatory:
Why did Britain evolve such a complex mechanism when this pattern seems so simple? Water economy: these valves can leak and can be kept permanently open, allowing precious gallons to be wasted.
I've never been to Britain, but my impression is that it's not a particularly dry place. Why would "water economy" be so much more important there than in e.g. Israel or California? Perhaps toilet technology is as path-dependent as any other evolutionary process?
I added a tiny bit of context when posting - to explain to people why this might be interesting to them. "Pythagorean 'greedy' cup - empties entirely if filled too much".
What's the purpose of reducing that to just the raw wikipedia title?
I would have skipped it under the current title.
Glad I did, too, because it's such a clever "gadget"!
Answer to this question can be found by only two ways (I feel So) either by using the cup or asking someone who has used it.
Can we get this kind of cup any where online?
A more obvious subversion of this would be to stick your finger in the discharge at the bottom. Fill it as much as you want then.
BTW, shapedo has a tool to migrate all your thingiverse items over with one click :)
PS: My initial thought was incaseing the channel in the edge would be less obvious but that would have more issues with tipping.
The only moment it can spill is when you fill it, at which point it would likely be in horizontal position.
Those Greeks, funny guys!