Muy buen producto

I really didn't pay attention that these came in 3 different sizes. I like this fact. I also like it because I travel a lot and I can take these with me on the road and fill them up as needed. They are so worth the purchase.

Exactly as advertised, smallest size is for children possibly infants.

Very durable, impressive product overall

I have not had this long but the only problem I've had is that for the smallest bag, I need to screw the top on very tight to get it to be totally leak-free. If I don't, it will drip slowly around the cap but only if I squeeze the bag very hard. Its not a problem in normal use and the other bags have great seals -- just snug them down firmly and I get no leaking no matter how hard I squeeze the bag.

There is one feature I was not expecting and I will not judge it as a positive or negative yet. Other bags that I have bought have a tapered seal between the cap and bag opening (both made of a fairly hard plastic). These have never failed after years (in some cases, decades) of use and seal without having to screw the lid on very hard. My new bags (Ohuhu) have a slight ridge-ring around the bag portion that press into a silicone (or similar rubbery material) gasket.

I don't know what the future holds for the gasket seal but this is my biggest concern. Gaskets can eventually become distorted (especially if left compressed continuously) and start to leak or require more tightening than usual to prevent leakage. But this depends on how resilient the gasket material is and I suspect that it won't be a problem for years (or decades) into the future. I realize that my "preferred" taper seal is not without its pitfalls, either. While I never had a problem with them, if they do get scratched or dinged, the seal can be compromised -- perhaps irreparably. At least with the gasket, if there is a problem, it can usually be cured by tightening it more or, you can usually find a replacement gasket.

I am not getting new bags because my old ones failed but because I haven't cared for them well enough and one of my big bags (roughly between the medium and large Ohuhu bags) has gotten a bit moldy. I will say that the material of the Ohuhu seems much more durable. The outside is a tough nylon(ish) cloth which I expect will resist abrasion and any potential puncture events that might happen in normal use (I wouldn't set it on a board with an exposed nail and then set a box of books on it or use it as a cutting board -- but that isn't normal use). In this respect, I like them a lot better than my old bags.

If you haven't used ice bags, they're less expensive and less wasteful than the single use cold packs. They stay cold longer than the single use or re-freezable packs. If you find the ice has melted, it's easy to just dump out some of the water and add a few more ice cubes. I sometimes use them as hot-water bags, too. I don't know what the manufacturer recommendation is on their use for hot water, though.

I've also found that the best way to use them (for me) is to put in quite a bit of ice and just enough water to allow ice to move around freely so the bag can conform to your body. If the bag is too full, it will roll off when you try to have it sit in place on your head, shoulder, etc. I then squeeze the bag till the water is almost to the top of the opening and then put the cap on. In other words, have as little air in the bag as possible -- again, because a full bag will be too much like an inflated balloon and just roll off.

Nice that they came in 3different sizes. It fits all of our needs. Great idea! Thank you!