system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do all soda companies have the same size and shape of can/bottle?

Wouldn’t companies have variance between products? Or is there some sort of standard that causes all of these cans and bottles to be manufactured the exact same way? There are some other examples of this but soda is just the first that comes to mind.
gpt
While it is true that a different company takes care of the packaging, this doesn't stop them from requesting different sizes and shapes. Or even building their own packaging facilities.

However most soda companies would try to stick to the standard. That's party because they don't want to lose potential sale from things like vending machines. Or stores that can't be bothered to handle logistics on storing and handling a specific container shape, while every other brand is easier because they're similar.