They already have the means of production. If someone wants their toast or clothes this someone will have to work for someone else to have that thing. People don't need to provide value for others, they could just act as a group and do things for each other. Sense of community. Kindness. These two are simple insights capitalists could try to understand.

Community and kindness alone don't produce anything. And again, if people want to work for themselves, they can try and become entrepreneurs. Starting a business is risky though, as you're going to have to be better, more efficient than your competition or find some demand that isn't utilized. Also, if you don't understand how fucked up it is to say that "people don't need to produce value for each other" in a conversation about economics, you need to read more economics.

I've not said that only one company would dominate everything. I've said that big corporations can dominate the market over small businesses. And about this list you posted: Guaraná Antártica, Soda Antártica and Sukita have all been bought by PepsiCo. Guaraná Jesus, Kuat Guaraná and Guaraná Taí have been bought by Coca Cola. All of those with "Primo Schinchariol" in the end are from a company named Brasil Kirin wich is a division from Kirin Holdings Company. The other brands are mostly regional and have really small consumption.

A bigger company is going to have a bigger input and output, just like a bigger person. As long as there's enough demand to justify competition, I don't see the problem.

And the ability to sell the same things with a lower price is not having power? Lol! Also, I like the fact that you supressed both Nestlé (who's buying nearly every bottled water company out there) and Unilever.

That depends what you mean by power. If you want better answers regarding Nestle and Unilever, try to find some people from /r/austrian_economics. I'm generally better at the philosophy side of things.