Bests & Worsts Reviews from Amazon

I truly loved this mug, because it is so sturdy and the black & silver looked so beautiful, the magnetic lid was not leak proof and I was willing to deal with that but when it started rusting, well, that was the last straw which is such ashame. I have another yeti product that I use multiple times daily and it's fantastic. By the way I ordered this 30 oz rambler on Nov. 4th. Rusting with less than 30 day usage, I wonder if this is an authentic item.