Review on 🔥 Stay Warm On-the-Go: Heated Smart Travel Mug with Temperature Control – 16oz – 12V – Stainless Steel by Kenkoy Braggs

This thing is TERRIBLE at holding temperature or even heat when not plugged into an outlet. Even when plugged in, it takes time to warm up. Good luck keeping your drink warm when it's not plugged in. In fact, the drink seemed to get colder. The cable itself is cumbersome in a car and you have to buy a big and bulky adapter if you want to use it outside the car. It's a great talking point because of its unique design, but that's all it's good for: talking about how it doesn't keep you warm. There is also a small hole in the lid that leaks when tilted at a certain angle which makes this product even worse. If you want something that will actually keep your drink warm, use a regular thermos. It's much more durable and REALLY WORKS! Nonetheless, nice try.