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I've bought 2 of these in the past that were very good and dependable (the 32 oz models), but this one has a faulty seal that leaks. I thought at first I was putting the lid on wrong, but after 20 min of putting the lid on and off again (and going a lil crazy) I noticed the damage in the seal which was causing the leak. So just letting everyone know to be aware of this issue.
So unless you're Brian Shaw, this thing is probably going to be too big to hold in one hand. It's much bigger around than a typical shaker bottle which means it also will not fit in a typical car cup holder. I do like the capacity and the fact that it resembles a cup instead of a jug. I wish they would have tapered the bottom a little more so that it fit in a regular cup holder though. It's also quite a bit taller than a regular shake bottle but I expected that, I just didn't think it would be so big around, not used to something with such girth.