It's a good and convenient item, it's just a pity that the water doesn't fully curl back into the flask and that the part where the dog drinks is exposed and gets dirty, and I wouldn't really want the dog to drink with microbes. But I still recommend it.
It's not a cheap bottle, but it is undoubtedly the best one I have seen and, now, owned. The others leak, but this one, being partly made of silicone, doesn't allow water to escape. It's a little heavy, but I've already taken it for a walk hanging from my bag and on the leash, and it's not uncomfortable. My dog has also approved it, since he has already drunk water from it. I have already recommended it to several people. It came in a small bag inside a box, very well protected.