When I used to work in a supermarket, I hated the stupid customers. This is a classic example. One of the soft drink companies fairly regularly gave away 50% free.
Therefore, for the same price, the bottle would be 3 litres in size rather than 2.
The amount of people who didn't like that.
"Excuse me, where's the 2 litre bottle?"
"Oh, it's the same price miss, you get an extra litre for free."
"But I don't want 3 litres, I only want two!"
Sigh!
Yeah, when I hauled my groceries by bicycle, I wouldn't want the larger sizes... But I also wouldn't be bitching out the person who isn't involved in the decision process...
I'm with the customer on this one. Soft drinks only stay good so long so having them in a larger container works against you. Also, having a larger container means needing more space to store it, and it is heavier and more unwieldy to carry. For some that extra litre of cola might be more like a white elephant than a boon.