Bests & Worsts Reviews from Amazon

I see the one- and two-star ratings far outweigh the five-star ratings, and for good reason. I saw these on "Shark Tank" and thought this was THE thing I needed. I was tired of my tea being too hot for far too long in my well-insulated mug, and then having to drink it up fast when it was at a nice, warm drinkable temperature before it went cold. According to the "entrepreneurs", they came in with covered coffee mugs that were still steaming three hours after they had put the Joulies in. From my many different attempts, from their recommendations to many different "configurations" of Jouilies and ounces of boiling hot tea, there is ABSOLUTELY NO WAY that was possible, unless their coffee was about 1000 degrees to start with! No matter what variation I tried, the Joulies cooled the tea down quickly, but did not maintain that "perfect 140-degree" temperature for any amount of time. So, quick cool-down to 140, then continuous cooling quickly. Needless to say, if you put any value on reviews, please take note that the negative reviews here far outnumber the positives greatly, and take heed. If all of us "negatives" just happen to be getting "defective" product, that should tell you how unreliable their manufacturing processes and quality control standards are. SAVE YOUR MONEY FOR SOMETHING ELSE!