For example, they could be entirely open about this product being something new and different but from the same manufacturer. An example of this is Nya Carnegiebryggeriet, "a collaborative joint venture between Carlsberg Sweden and Brooklyn Brewery"[1]. They don't try to hide the fact that it's owned by Carlsberg[2] (4th largest brewery group in the world), but they make it very clear that it's a different category from their regular lineup.
If that seems to risky, they could sell it under a different brand without deliberately attempting to deceive customers into thinking it's from a small-scale craft brewer. Just present the product honestly under a new name without the misleading bullshit.