I love them love them, we love them. I don't see how anyone can ever buy anything and go on a road trip or go outside or to the pool or to the lake and not have one of these readily available some of them even with the adapter at the bottom you can put several pieces of ice in the bottom and it will stay cold for hours like the temperature that it keeps is absolutely phenomenal we actually purchased a couple cup holder expanders from Amazon and we can get a Starbucks iced mocha or something and literally 4 hours later it still has ice there is no sweat no condensation it's amazing