These bottles worked out well for us as we went on our shore excursions.

Perfect for my needs! I like Make sure you snap the cap on well, I lost one because I wasn’t vigilant-user error. The carabiners were an added bonus. Easy to pack and they held up with travel on several desert hikes. No trash to pack out. They were also perfect for airplane travel. I could fill them up at the terminal water stations and bring them on board.

I hike daily and enjoy the light weight and flexibility of these bags.

I live alone and often do not consume the milk that I buy before it spoils. I purchased these flexible water bottles so I could immediately transfer the milk that I buy into one of these bottles. In this way, after I pour my milk, I can remove any air that remains in the flexible bottle. This considerably increases the shelf life of my fresh milk.

These were a very affordable alternative to a more popular brand. They get the job done that’s for sure.

I was happy to see these arrive flat instead of rolled/folded up. These are a similar construction and material to bags I've had in the past that will survive thousands of miles of rough hiking, going 10 years if treated well and more like 4-6 if folded up regularly. The folds weaken the side seams and eventually allow leaks, so it is best to try to keep them flat.
I was looking for an approximately 1L bottle to carry separate from my hydration system to carry on short excursions where the pack was left behind as well as something to abuse with powdered drink mixes and electrolytes. This is great for both. Easy to carry with the sturdy, thickened handle. Easy as any bottle to fill through the 28mm opening that attaches to the clean side of my Hydroblu filter or just poured from another bottle with a similar opening. No extra weight for a silly "zipper" on the bottom and instead get pleats that allow it to stand. Once it gets rinsed out a couple times, no extra flavor like TPU gives. It can pick up flavor from water (and drink mixes) so caution can be in order when switching to another flavor of mix.
I do see a little weakness in the structure of the top. The plastic feels a little more brittle than others I've seen. Where it is attached into the edge seam doesn't have as long arms as is often seen. When opening and closing the cap, this gets stressed and one should hold it at this seam, but there's not as much leverage without the extra arms. It also forces the plastic into tighter curves done this way. It'll save a little weight, but not enough to justify the weakening. The picture shows this with this product in the middle and it has been a problem for the Evernew bottles (left) but not the Platypus bottles (right).
Weight is just 29.8g for the bottle and cap including the dust cover. I would kind of like a normal cap, but none were included. The push-pull cap is 6g or 4.8g once the dust cover vanishes. We get a set of locking carabiners with it that weigh 20.7g each. While not for climbing, they are still a lot better than one generally sees to supposedly hold your bottle full of that heavy substance water. The locks spin easily for use.

I specifically got these bottle for hiking, trail running, and mountain biking. In each of these cases when I bring a traditional water bottle I get the water sloshing around and it get very annoying to me. These water bottle prevent that. I really like that they are lightweight too. That is a big plus. It does ncome with 3 mini carabiners that work to hold the bottles to your pack. However, they are not the best and I replaced mine with larger, better ones.
The material is strong, odor free, very resistant to punctures, and just super durable. I can’t find any flaws or imperfections in the manufacturer of these bottles at all. The mouthpiece doesn’t leak, but it does seal completely when needed. I can stick one of these in my backpack, or leg pocket and not worry about it leaking.
Overall, these are some nice bottles that fit just about anywhere and work great for holding a variety of liquids.

Firstly, I didn't know a thing such as this existed but I stumbled into them looking for a water bottle to put in my motorcycle backpack and they were the perfect solution. I wanted something light, not bulky and something that wouldn't be uncomfortable bouncing off my back in the pack while I ride. These fit every requirement!
So far I have used only 1 and have just refilled it over and over, probably 45-50 times. It seems to be quite durable and it doesn't leak when the cap is screwed on snugly and the nipple closed. I am sensitive to 'plastic-y' tastes and smells, I don't get any perception of any off-putting odors or tastes.
I would certainly recommend!