The bottle itself is good. The lid is one that if you tighten ...
594791
The bottle itself is good. The lid is one that if you tighten too much it just pops off. Not a problem until you are carrying it by the lid and it falls, sending water everywhere, and putting a nice dent in the bottle. Would use it way more if that wasn't the issue.
2961914
The insulation properties of the bottle work well, though I've only ever used it with cold liquids, so I can't attest to how well it works to contain heat.
However, the lid is poorly-designed.  The "spring" (little more than a silicone o-ring) continually disconnects (I've given up on rehooking it), the metal clip to lock the lid closed fell off, and the air hole will often fill with water, causing it to "glug" out while drinking.  The lid is also not incredibly terribly water-tight, and leaks were an issue even before the latch fell off.  Without the lock, water leaks regularly if tipped too far.

Despite these issues, I still use the bottle (mainly because I haven't found a suitable replacement yet) and the metal bottle has held up fairly well.  The smooth surface can be a problem when trying to keep it upright to avoid leaks and carrying several other items, and I've almost burned myself on the metal when I've been absent-minded enough to leave it in the sun while at a work site.  This even led to dropping it on one occasion that left a big enough crack in the upper portion of the lid (the cover, not the spout) that any illusion of water-tight integrity is gone.

My wife bought the same bottle after she found out about how well it kept my ice water absolutely frigid, but has since bought a different bottle because she had similar issues with the lid (though she hasn't yet lost the latch or dropped hers, so it's just the o-ring, water leaking, and annoying transport), which leads me to believe that at least some of these issues aren't simply an isolated occurrence.
2998489
it's a great bottle - the only issue i have is that the cap doesn't align and close all the way.  No biggie if you're not shaking it around and holding it upside down.  It definitely does it's job and I like that it's not a small little spout/opening to drink.  It's like a tall glass with the infuser just screwed on in the middle.
1535293
The lid is threaded which is good.  BUT, it does not screw on easily.  The male and female threads don't align easily.  And it does not screw on real tight.  It feels like the lid could pop off the thread, without warning, spilling coffee all over yourself.  Both lids have the same problem.  The good side is I have not had any leak around the thread, so far.
4276126
I love the bottle. The flip lid does not work well though.
1224699
The bottle itself is very useful and I still use it. However, the metallic ring in the lid got rusty in a few weeks of using it and I had to throw it away. I tried using the flip top lid that I purchased in addition to this item but that does not seal very well and water drips off the sides. Anyway, I still use the bottle as it is nice to see the clear water and very easy to clean too. I would have loved it if a proper lid were made for this bottle.
1891064
The bottle is okay I first took a sip and it dripped all over me. I adjusted the seal which seemed to have helped a little bit. The bottle is still leaking which makes it impossible to use at work. The plastic on the inside seems to be cheaply made that it doesn't fit it perfectly. The lid and the infuser can close at many angles which takes more time to put together. But I suppose for the price I shouldn't expect perfection.
2723306
The bottle is great, but the lid only lasted a month, and it leaked HORRIBLY!
3589497
This lid works well for my use, however, I don't bang it around or leave the bottle on its side so I've had no issues with it leaking like some people have described. Overall I am very happy with this Item.
4814738
Been using this for about 2 months and I can't really complain. The only issue I have is that it seems one bottle is more prone to a slight leak from the top but I've found that I just need to tighten it a little more and it's fine.

I would recommend this to friends.
3563203
This product is okay.... I really like the bottle itself, it's fine. The part I'm not such a huge fan of is the cap. The way it's designed to just sit inside the bottle isn't very effective when it's being used. It doesn't stay put well enough to put the cap on and I keep being afraid it's going to fall out. So far, I've had the whole cap system fall in the bottle by accident a few times. If this had a better cap/spot system it would be great. I just can't get it to stay where I need it to.
2035590
Overall a good water bottle at a great price.  I especially like the fact that the thread is outside for the same reason that the other reviewer mentioned.  However, I do find that the lid has to be closed tightly, if not it will leak quite easily.  Another complain I have is that I can taste the metallic taste.  Otherwise, a good bottle.

Just to inform other people, the 1 liter bottle I have does not fit into my car's bottle holder.  The base is pretty big.
246933
It's a good choice if you prefer a glass bottle, be careful if you buy it for a rough toddler. Our lid broke and now we can't use it. I probably can buy new lids
2020882
delivers as promised keeps water cold is strudy and is actually not as bulky as i thought it was going to be, which was nice. With that being said the they could have provided a better lid. The opening of the bottle is very wide you have to be careful when taking a drink that you don't spill on your shirt. overall good purchase
3593283
The bright color reminds me to drink more water and the bottle seems sturdy. The lid however, is really hard to close.
2340875
I bought a few of these in different colors. The bottle is essentially as expected. I agree with other complaints that the lid does not always seat properly, which could lead to leaks if one were using this to carry with them and don't notice that the lid did not go on properly (it is easy to not notice). Since I am just using it around the house, it is not an issue for me. I did see Lifefactory introduced a new lid for these, but that style of lid does not appeal to me. If I were to use glass bottles to carry with me, I would use the glass version of the Camelbak Eddy, which I also own and does not have the problem. The glass Eddy uses the same lids as the standard plastic Eddy. The Eddy is typically slightly cheaper than the Lifefactory also. However, given the weight of glass bottles, I would prefer not to use either regularly as a portable bottle. The Lifefactory bottles definitely look much nicer, so if you are mostly just using them vertically without carrying it in a bag, it is fine.
4318849
Water tastes good (this got my kids to drink water!), but the lid is a bit iffy at times.  It leaks and spills a bit and the plastic around the handle is starting to lightly crack.  It is good, I just wish it was a little more sturdy.