I love these insulated cups. I have been using this for several weeks and it insulates extremely well. I did a 3 hour test starting with a cold 33.4 degree water, no ice at all. In the span of three hours it lost only 6 degrees. The first hour it lost 4 degrees probably due to the cup being at room temperature, but from hour 2 to 3 it lost only 0.3 degrees! Once it gets to its happy spot it stays there. At the end of three hours the water was still a crisp 39 degrees and if you throw a few ice cubes in there, it would stay cold all day. I have nothing negative to say. Works great!
Review by on May 11, 2016