I received my Thermos insulator and I thought I'd try a scientific test in evaluating it's effectiveness. I used two cold cans of soda, one with the insulator and one without and tested them over a 3 hour period in a 78 degree room. I took the temps using a Thermapen device, an accurate cooking thermometer. The can WITH the insulator started at 35 degrees and after the 3 hours, gained exactly 20 degrees, while the can WITHOUT the insulator started at 35 degrees and gained 36 degrees. The performance wasn't quite as good as I had hoped, but is still exceptable in keeping it cooler. Definitely better than drinking soda at room temperature. Oh, I ended up using paint thinner/mineral spirits (and elbow grease) to clean the nasty gummy goo off after taking the label off.