Half the bran I used to be

Corn Flake is the singular of Corn Flakes. That's what you are left with after you eat all the rest. The unmusically named Vita Brits become, in the singular, a Vita Brit. Porridge and muesli and All Bran don't have a singular separate to their plural. They're like sheep, which either don't have a singular or don't have a plural, but don't seem to be especially exercised about the matter either way. You either have more or less porridge, more or less muesli, and more or less sheep walking all over the place while you're just trying to eat your damn cereal. (And, just by the by, I'm not sure if it is physically possible to ever get down to just one bit of muesli - because then you'd just have a sultana, or an oat. This is probably a law of the universe, like not being able to break the speed of light.)

But what about Weet Bix? This is something that I am really not sure about. Are Weet Bix the plural? And if so, what is the singular? A Weet Bit? A Weet Bick? What is Weet anyway, and how do you make Bix out of it? Anyway, this much is clear: if you add enough milk to Weet Bix, eventually one of the e's will dissolve and it will just become Wet Bix.

Can anyone help me out with that question, though, on whether Weet Bix has a singular? In the meantime, I'm off to pour out half of the contents of a packet of All Bran, and sell the rest of it under an exciting new brand name. It will be called Some Bran.