As an educator, sometimes during the day you walk away from your desk and don’t return for hours. Before I left my home I got an energy drink out and placed it in my Frost Buddy. (650 am) My desk is in direct sunlight so it can get a little toasty but I figured the first test of this should be the ultimate test to make sure it is beach worthy. I opened my energy drink around 9am and after the first drink, I noticed that it felt like it just came out of the fridge. (This isn’t the impressive part) (This is!) I walked away from my desk around 930, there was about 1/3 of the can left, still sitting in direct sunlight. Classroom A/C is set at 75° when movement isn’t detected and we were outside. I returned to my room at 230, and took a drink. It was still cold! I removed the can from my Frost Buddy, there was still condensation on the can and the feel of the can was surprisingly still cold! Impressed is an understatement!