These bottles are great! I love that the squeeze feature is truly water tight until you squeeze it. I've been using mine (which I got in a MightyFix) for micellar water and never had a leak. Haven't used the hook feature, but that's not a reason I would have purchased this.

I love the concept of these silicone tubes. They are easy to fill and clean and they work well. However, they are quite bulky. I brought them to hold my toiletries for air travel and they are too bulky to fit everything I need into a 1 quart ziplock bag. (I'm a girl so I bring a lot of different items - shampoo, conditioner, hair cream, hair gel, face wash, face cream... the list goes on!) Basically, I need a slimmer design of these tubes and they would be perfect.

One other thing that I think is worth mentioning: I partly bought these specific tubes because of their cap lock/hanging ring. However, if you use the cap lock it makes the tube take up even more space. Also, if you're using the cap lock as a ring to hang the tube, (1) it doesn't feel very sturdy so I wouldn't fully trust it to hang on the outside of a pack for hiking/backpacking or anywhere where it could get banged around, and (2) it hangs the tube upside down so that you have to shake the contents back down in order to get them out. It would be nice if the ring were sturdier and on the other end of the tube.

To sum up, if you want these tubes for non-airplane travel (or if you do not need to cram as many different products as I do into a 1 quart bag) and the tubes are not at risk of getting banged around when hanging from a pack, this is a great product!