It’s not always an available option. If an ink maker deprecates old containers and starts selling smaller ones for almost the same price you can’t just buy something else if you need consistency. Coca-Cola probably thinks that you can’t just replace Coca-Cola®™© with substitutes and I know some people would agree
Well, I meant within brands. Drug packages are the worst. I’ve seen two boxes of the same drug side by side and the smaller box had more tablets. That is to say, containers can be deceptive. Look at the volume and weight of the product.
Have yet to see those, but I met packaging for 1 (yes, one) capsule that was about half of a phone size, looked like the usual package for 20 something tablets. In this case it could be a matter of standard package though
But then there’s Velaxin that was cheaper in 20×75mg pack then 20×32.5mg, and this I cannot understand ¯\_(ツ)_/¯