If you are looking for the bottle to take with you into the bush I highly recommend this bottle for a number of reasons, but the main reason that no one in their reviews are acknowledging is that the O-ring (the rubber water-tight seal thing) is engineered to be on the lid, not the main bottle itself. This is perfect for boiling water on a campfire in your bottle.Yeah, that is right; I've put this thing IN A FIRE at least a dozen times now and BOILED WATER for purification, pond-scum/stream water flowing in the wilderness at that. And it's still doing fine. I must say even though the melting temperature of titanium is 3034° Fahrenheit or 1668° Celsius, and most wood fires are about a third of that I heard. I haven't put just the bottle in there without water to absorb the heat so that evaporative cooling will keep it from getting up to a thousand degrees Fahrenheit. So I don't expect the bottle itself gets much higher than the boiling temperature of water. Titanium will not melt at this temperature, but it could weaken for all I know from heating and cooling like that. So in short I just don't put it in the fire unless it has a good amount of liquid water (or frozen ice and snow) in there and I'm fairly certain it's not getting more than a few hundred degrees, but I'm just guessing here.Obviously, the lid should be removed when boiling, preferably a safe distance away from the fire. I never bothered to test it, but I'm certain the O-ring would melt if it gets too close to the fire.Every water bottle I have seen before have either plastic or rubber built into the main bottle itself until now. As far as I can tell, this is the only bottle to have a boil safe design. Whether it was intentionally designed or not, it works wonders nonetheless.There seems to be a lot of people complaining here about how this bottle was made in China or its metallurgy is not one-hundred percent titanium in construction. The claim that this is not 100% titanium is seemingly based on the fact this bottle will dent if full of water and dropped onto concrete from five feet in the air. (Steel bottles will too unless they have thick walls.) Titanium is not Adamantium, it dents just like steel, its real structural quality here is that it's lighter than steel. This is better for backpacking. This bottle is not invincible nor is it advertised in that way. I am no scientist, but I did some research and this has all the properties of 100% titanium as far as I can tell without doing some destructive testing.What I do know for certain about the metal on this bottle is that it leaves no taste whatsoever in the water, even when water is stored in it for months. It is virtually non-corrosive, especially when exposed to a wood fire. (I find steel, including stainless, rusts like crazy when exposed to both flames and moisture over time.) Any soot rubs off easily after boiling. There is no burnable paint or logos on the surface, the “TITANIUM VARGO” label is completely intact after surviving many fires. This thing can dent (as mine did) if it's full of heavy water and dropped on a rock or hard surface from shoulder height. All my dents (three) are very small, superficial, and do not concern a U.S. Army combat veteran like myself.I read a review where a person complained about the sound the lid made when screwing and unscrewing the cap off. My girlfriend at the time (I broke it off after she kept insisting that I reenlist in the army) complained about the noise too. I'll agree the first forty times or so you screw it on and off it squeaks a bit, but it's not loud at all. I'm not sorry to say that people who are turned off by a little squeak need to stop being a wimpy bat-eared pessimist (like my ex-girlfriend.) The squeak goes away after a good polishing from natural use, if you prefer, a plastic top version is available. Excellent Water Bottle! As durable as my stainless KleenKanteen and almost half the weight of a Nalgene (which weighs in at 6.7oz on my scale, while this Vargo bottle weighs 3.8oz). You're losing about 25% capacity over a nalgene (32fl oz vs 24 with this bottle), but I bought the lightweight Sawyer water filter to keep handy and fill up more often and carry less water overall (I use to carry two full nalgenes).This bottle is about the same height as a nalgene, but with a slimmer profile, which is much more pleasant to carry and store. The entire bottle is made of a matte/brushed finish titanium, including the cap. The exception on my bottle is the threaded area on the cap is polished smooth, probably because of complaints of the noise that the metal on metal makes when screwing on or off. I've read other reviews about this noise. Doesn't bother me at all. Reminds me of a WWII canteen my grandfather gave me as a kid. There is also a robust silicon ring in the cap to seal it shut.It's exactly what I expected to get and I'm quite happy with it. There's nothing fancy about it, but it's titanium, so it'll last a lifetime if you care for it. More importantly, you don't have to worry about chemicals or metallic taste leaching into your water. And you can put it in a fire and boil water, if need be (with cap off, of course).Did I mention it's VERY light ;)Update: Since writing my review I went back and read some of the bad reviews and I would just like to address some complaints. I purchased my bottle in April of 2016, maybe some of the bad reviews received older versions, not sure.-Does it dent easily? No. Will it dent? Yes. I have a fair amount of hand strength and if squeezing it, using my thumb as a pressure point, as hard as I can, right in the middle I can begin to press the sidewall in. Which means I probably can permanently dent it, which I won't do. The point of titanium pots, pans, water bottles, etc. is that they get a good strength to weight ratio. That doesn't mean that you're going to get a bottle with the same thickness walls as a stainless steel bottle. It means that they can make the walls a bit thinner, because titanium retains good strength with thinner walls, thus eliminating that much more overall weight. Titanium isn't indestructible, tho. If you drop this bottle on a sharp rock it's going to dent. So, don't do that.-Leaking cap? I've had mine full of water, flipped upside down for the last hour... No leak. I'll leave it overnight just to make sure. If you leave any water-filled object in the sun the rising temperature of the water creates pressure (ever heard of a steam-engine). The seal can fail (and should) if the liquid inside begins rising in temperature. That being said, one of the great things about this bottle is you can put hot liquids in it... and even boil water in it. It's not insulated so don't expect those liquids to stay hot, but at least you don't have the worries of leaching chemicals like with a Nalgene... Just sayin.-Bad lid? The lid squeaks. This is your warning... it is a slightly dull metal-on-metal sound. It's not loud, nor jarring. It just is. It doesn't bother me in the least. The threads on my cap and bottle are great and I haven't had any issue with cross-threading... not even sure it would allow it, beings that it's such a tight fit. The cap threads are polished metal, the inside of the mouth is the same matte finish. I haven't had mine long enough, but my guess is that over time it will get smoother and smoother, until one day there is virtually no sound. If not, I'll update this post. So far this bottle has been great!This bottle beats my Nalgenes for weight, strength, durability (long-lasting), being chemically inert and I can boil in it. What more could you want?High quality itemHab mir die Wasserflasche für meine Tanktasche vom Motorrad bestellt da diese maßlich perfekt hineinpasst.Optik und Gewicht sind super, das Erwarte ich zu dem Preis aber auch.Der Deckel Kratzt etwas beim zudrehen, legt sich aber vielleicht nach mehrmaligem Gebrauch.Zur Dichtheit kann ich leider nichts sagen da ich die Flasche wieder zurückgeschickt habe.Laut Herstellerangabe misst diese 7cm im Durchmesser und ist 22cm Hoch.Leider wird hier ohne Deckel gemessen, somit kommen nochmal ca. 2cm drauf, für meinen Zweck deshalb unbrauchbar.Ob der Preis für dieses Produkt gerechtfertigt ist muss jeder selbst entscheiden, ich hätte sie mir zu dem hohen Preis jedenfalls nicht gekauft wenn es nicht die einzige mit den "Augenscheinlich" Perfekten Maßen gewesen wäre die ich gefunden habe.I have been using this as my carry-bottle while I do trail maintenance in the bush. I carry it on my belt in a OneTigris insulated bottle carrier. The best part is the weight is really light. I carry an axe, a hand-saw and a gun so I don't need any extra weight. Just the canteen and a knife on my belt. The volume is enough to easily last me for two hours of physical work. Then I refill when I take a break. The gasket is good too, no leaks."sturdy" foldaway carry loop is not sturdy. The two anchor points are tack welded on and will fail from metal fatigue. Other than that its very very good. I've owned mine for 3 years and the carry loop broke off after a few months of use. The rest of the bottle is very sturdy and does not leak.Dishwasher safe, no leaks, does not add taste to your drinks, but super expensive. People seems to be annoyed that it gets dirty very quickly due to fingerprints, but I kinda like it actually! It makes every bottle unique, and it goes away when you wash it. Lost one star because of insane price