Bests & Worsts Reviews from Amazon

I bought this mug a month ago and it has worked pretty much as expected. Keeps coffee steaming hot for a decent amount of time. However, after only a month the inner coating on the base of the mug has already started bubbling and chipping off (see photos below). I am always careful when washing the mug, never use anything abrasive, have never stirred my drink with a spoon. I am pretty concerned about how long this is going to last, given that this has already started after only a month of very gentle use. I am giving this 3 stars as a compromise between how well the mug functions, but how quickly the materials have worn. I will reach out to the manufacturer and hopefully get a satisfactory response. UPDATE: Customer service contacted me very quickly and offered to send a pre-paid shipping label for me to return the cup. I assume they are sending me a new one (thought their email to me was vague on that point). UPDATE 2: received a new mug quickly and mailed back the old one. So far so good. UPDATE 3: well the interior is chipping again. I was super careful in hand washing and it started chipping again in the exact same place. Also, now the base appears to be broken and one of the metal contacts is stuck down and the mug won’t charge. I’m lowering my rating to 2 stars. Love the concept but too many problems for the price.