I was in the supermarket getting some laundry powder last night and noticed something really strange: every single brand of concentrated laundry powder was advertising on their packaging the fact that they're about to be relaunched in a new version. The new powders are all going to be 2x as concentrated, and most brands made a big deal out of the fact that the new packaging will therefore be half the size.
Golly. Every brand? All at once? All deciding to redo their formulation, redo their packaging, and retool their manufacturing plants, all with identical changes to formulation and packaging, all at the same time? Unpossible!
You'd almost think that every brand of powder was actually exactly the same, made at the same plant, and just packaged slightly differently. But that would surely never happen!