Bests & Worsts Reviews from Amazon

Great water bottles. I love the insulating qualities. Ice can last for 24 hours if you start with putting cold water from the fridge in with the ice. If you start with only room temperature water straight from the tap, a good portion of the ice melts immediately. That's nothing to do with the insulating qualities. I also bought this bottle over other bottles due to the double cap. Remove the whole cap to fill with ice and water. Remove the small cap to drink from. It's most like a disposable water bottle cap which is the easiest to drink from in my opinion. Never any leaks with the good seals when you lightly tighten down both caps. The only reason I lowered this review to 4 star was because of this....I bought four of these bottles. Two 40oz and two 24oz. I noticed that one of the bottles(24oz..irrelevant) was not keeping ice nearly as long as the other three. I also notice the outside of the bottle was a little colder to the touch than the others. You should not be able to feel virtually any cold on the outside of a properly insulating bottle. It was also melting nearly twice as fast as the others under the same conditions. I decided to return it to amazon as defective and repurchased the same water bottle once again. The new one I received was just as good as the other three I bought previously. That would be my only complaint. If you feel it's not keeping ice for what you feel is long enough you may have a defective unit. I realize you may have nothing to compare to side by side but regardless, that may be the problem. Hope this helps. Thanks