Bests & Worsts Reviews from Amazon

Cold up to 36 hours? More like cold for at least 36 hours. I got this to keep ice for 40 hours while continually refilling it with water. If I just let it sit it could probably run for 48 or more. The spout and straw works very nicely, it doesn't leave much at the bottom, and doesn't squeak or slurp when drinking, and doesn't leak either. The rubber ring at the bottom is kinda loose and pretty useless, but it comes off easily enough and looks just fine without it My only real gripe with this product is that it only comes in really bright colors, and they all have their giant logo slapped across the side. However, it really is the coldest water, so I guess it's pretty justified if anyone asks.