Growing up, we didn't have central air/heating or for a long time anything other than box fans for cooling. So, no matter how cold our drink was for meal times, when it was poured in a glass it got warm almost immediately. I don't remember if it was Mama or Daddy who got the idea to put the glasses in the freezer for an hour or two before meal time. When that was done and then the cold drink (usually milk or tea) was poured in, it stayed cold for a bit longer. I did this for mine last night and it was great.