In the UK, we used to have king size chocolate bars that received a lot of bad press saying that they were encouraging obesity.

The solution was to come up with packs that had two smaller bars in. The marketing was focused on either sharing or saving one for later. It was bullshit as most people just eat one then the other but it did allow the companies to say that they weren’t intended to be eaten at the same time.

I think that the sharing bags are a similar tactic to allow them to argue that they aren’t encouraging people to eat too much.