Nope. Imagine, as a nonsensical example, that Coca-Cola decided to put pesticides in all their products. Quick, which drinks do you avoid?
It may not be such a nonsensical example. We saw a very similar thing last year, when cat and dog food started causing renal failure in pets. It turns out that the majority of the pet food brands you find in the grocery store-- even the cheap, knock-off brands-- are manufactured by a tiny handful of companies, most of which all sourced their wheat from the same Chinese company.
As a result, it took weeks to nail down every brand that could kill your pet, and more affected brands were cropping up every day. We ended up switching to a "whitelisted" brand during the fiasco, which did not set well with our dog's delicate constitution.
Even the retailers could not (or would not) keep up. We saw known-affected brands sitting on shelves at Wal-Mart and the local grocer throughout this fiasco.
Even if this is something to be worried about, I'm not sure there is anything that could/should be done about it. People like these brands and the products they make and thats why the sell 80% of all soda.
Maybe we should be cognizant of the fact, and it is possible that is all you were saying, but anything beyond that I'm not sure is a good idea.
Just my ramblings.
Anyway, the value of independent organizations is bad ideas are less likely to propagate between them.
Honest Tea is the name of the smaller company.
What you want is a diversity of wholesale suppliers, not a diversity of end product creators, if you're looking for ingredient purity.