“Well, This is #2 so far. Same great design and cooler. I bought #2 because the first one did an amazing job this summer. I prefer the 16oz. B.L. aluminum bottles mainly for being able to put the cap back on and keep out the Yellow Jackets. (It's a real buzz kill to have your mouth swell-up and try to find an antihistamine before you black-out). We had a warm summer here in Georgia and my Frost Buddie kept my drink cold. Their pretty much bullet proof (don't need to test that, but it might make an interesting new design) and will last till you lose it!”