I'm not a tall guy and I like riding with a revelate design frame pack. When I do, these bottles fit perfectly underneath in my bottle cages and not protrude too much into my frame pack. Yes, I'm also using one of those bottle cage adapters that lets me mount the cages lower. I just wished there are also lower profiles frame packs out there.
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 three of these bottles to use on my indoor trainer. Unfortunately, one had a small hole in the bottom in the injection site that dripped incessantly, one leaks around the nozzle when I drink, and one works fine. I'm not too broken up about it because I purchased these on closeout at a ridiculously low price. It didn't seem worth the trouble to go through the return process, etc. just for a few bucks. So hopefully BikeTiresDirect has exhausted their inventory of these pitiful products and I will try to be less of a cheapskate in my future purchases.
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 ,-)