The Elite Fly Bottle is my new favorite because it's made of a nice squeezable material, it has a straight shape with a large mouth that makes it easy to fill, and it's lightweight. The cap secures nicely with no leaks, the nozzle delivers fluid quickly, and the whole thing cleans up easily. I didn't know a bottle could be this good.
I bought this to check out the claims. Yes, you can save some grams. However, the plastic is very thin as expected and it can stay sucked in after taking a drink as the valve self-closes and then it doesn't fit in the cage correctly.
I wouldn't use it as a daily bottle, but I will save it for Strava hunting ,-)