My bottles of water, which I buy only because I can't find a reusable bottle this same size and shape*, have changed. The lids are about half the size, and the company is super proud of it.
This super special half-lid design and some other modifications mean this bottle has 20% less plastic than the company's previous bottle. This is great, except it now has 50% less of the ability to keep my water inside the bottle. Once opened, reapplying the lid takes talent and sticking your tongue out just right. If you fail in your attempt to fully close the bottle, the new micro-lid will LOOK like it's going to hold your water inside, but unless you hold it perfectly upright, you will expose the lid's failure to, well, be a functioning lid. This has resulted in the inside of my purse getting wet twice before I got smart about it and started double checking. This is an annoyance I just don't need.
Get your crap together, bottle makers. Maybe try 10% less plastic first until you work out the kinks.
(Too big, but probably leak-free------->)
*This matters because they fit in my backpack purse, not because I'm all hung up on this sort of thing. For reals.