After using the bottle for ice water while out and about, running around in the car (90+ degrees), I would say that my Thermos hydration bottle keeps ice water colder, longer. However, I LOVE this lid. It's easy to drink from, easy to refill and very, very secure. NO LEAKS, NO ACCIDENTALLY POPPING OPEN WHILE IN THE BACKPACK, and the bottle does a good job of keeping liquids cold. I did fill the bottle with ice and left it on the kitchen counter for about 26 hours and when I opened it there were still a few little ice cubes floating in the water. Not too shabby.
This bottle is perfect. It keeps water ice cold. It's got a none slip grip. The cap is perfection. No leaks. I will never buy a different brand water bottle again.
I love the color, size, and ease of drinking from this water bottle. It seems to keep my water cold for a couple of hours, but not all day like some. I usually have to refill it anyway. The handle is very comfortable and the bottle is easy to clean.