Ultimately shrinkflation is going to continue forever. The best thing you, as the consumer, can do is be vigilant in why you're buying and making are real time decision as to whether or not the price you're going to pay for that package size is worth it. You can't possibly remember the size of everything you've bought and to try to would drive you crazy.

Second, I know the ever-present excuse for detergent companies for why they can downsize and keep the same number of loads is, "less water", but it begs the question why they wouldn't just use the lower amount of water in the first place and save the packaging money.