These are tougher than they appear; very light. The top screws off and makes the bottle easier to fill (although the opening is still only maybe 1 1/4 inches. But then the top also flips open for drinking, and closes very tightly. Comes with a plastic caribiner which is sufficient to keep the bottle secure. They're actually a very good product although at first they don't seem so substantial. Only 700ml each, so if there were larger that would be better. I carry all three with me since they're pretty light weight, and if by chance one punctures, I have a backup. When full, the bottles can't stand upright because of how the bottom is form. But you can lay these down and definitely won't leak.

I tried to break them, I filled them up with water, threw them in a backpack, squished them while full, everything I could think of within reason that might happen to them and they have held up wonderfully. All 3 passed a 24 hour upside down leak test. These are a great value for the cost. Sturdy, easy to fill, easy to drink from, they clean easy, and do exactly what they need to do.

Bought these for a trip to Disney. Knew they’d be flimsy and cheap but the really leak ALOT around the cap. My husband put one in his carryon before walking off the plane and it leaked all over his laptop, frying it. Obviously shouldn’t have put them in same pocket. Hindsight. Had to buy a new 3K laptop! :(Used the water bottles on the OUTSIDE of bags only during our trip then threw all 3 away.

I received my bottles yesterday and so far I'm impressed with them. They're pretty handy if you ride a bike or jog, and being flexible makes them that much easier to handle. Overall very nice for the price.. I usually pay the same price for just one water bottle (the regular hard ones) in stores. Would recommend it for sure!

For such a low price, I was expecting a mediocre product, but I am really impressed. The bottle material is very strong and the cap provides a perfect seal with a very easy-to-open cover.I appreciate the effort taken in the packaging as well.It depends on your use, but I generally recommend these water bottles.

Really impressed by the product , it did meet my expectations . Very easy to use and store thanks to it's flexibility .I recommend this product and will continue using it in the future .

I have a lot of things to carry for school all day and adding a big water bottle is a big pain! These roll up and fit in a side pocket. I fill it up when I'm thirsty and just tuck it away when I"m done. Or I can just clip it to the handle of my tote bag when I'm walking around campus.

I took those to Central America fro a trip. They worked nicely and are easy to carry around. I found it a little difficult to clean, but great investment for the price. I recommend it.