The Ember Travel Mug is a coffee mug where you simply pour yourself a coffee, and you go. This mug does the heating for you and you don’t have to stand around and wait. This coffee mug is controlled by an app that pairs to the specific mug that you have. You can adjust the temperature and the length of time that the mug is warming your coffee. Forget you have a cup of coffee sitting at your kitchen because you got distracted and it’s cold? The Ember Travel Mug fixes that for you in minutes. 
Although this seems like an incredible innovation, giving users the satisfaction of drinking a cup of coffee that’s the same temperature as it was ten minutes ago, there are a few bugs that still need to be worked out. One being the battery life on the mug itself is only an hour long. So coffee addicts will be plugged into the charger/coaster for the majority of the day. But that battery life is at the default heat setting of 135 degrees. If you like your coffee hotter, then count on the battery life being lower. Besides, that and the few design issues that can be worked out, the Ember Travel Mug comes in at a price of $79.95. This includes the app. If you want to drink coffee at the same temperature from the first sip to the last drop, then consider the Ember Travel Mug.
https://www.slashgear.com/ember-ceramic-smart-mug-review-iot-for-your-coffee-01513249/
I think this is a really cool idea, coffee drinkers seems to be a huge market. I am a bit wary of the price, is it really worth that much money? Especially considering the current trend of yeti mugs which keep your coffee warm for hours without being charged.
I definitely think this is a really awesome idea, but the price is a little high and im not sure how many people would pay to have their coffee warm when they can heat it in other ways. I do love my coffee being super hot, and have to reheat it sometimes when it doesn’t stay fully warm, but I definitely couldn’t pay that price for a product that still has a few malfunctions.