Contigo AUTOSEAL Stainless Mug, 20 oz

We have had multiple Contigo mugs of this type in our household and have always been happy with them. I ordered a 2-pack for Christmas and one of the mugs has been defective since the first use - after making hot tea in it, the outside of the mug quickly gets very warm, and the tea is cold within an hour. Very disappointed. I’ve contacted Contigo three times (filled out 2 contact forms and one warranty claim form) and have had no response to any of them (within 5 weeks, and the warranty form says they would respond within 2 business days, and it’s now been 15). I am very dissatisfied with the customer service. The about $23 I paid for the defective mug is way too much for a plain, run-of-the mill/uninsulated mug.Update 3/9/25: one day after I posted my first review (2/18/25), I was contacted by a person from Contigo Consumer Service. After some back and forth (about formalities), I was supplied with a replacement mug and I'm happy to say that the new mug functions as intended. I updated my review from 1 to 3 stars, because I now have 2 functioning mugs but it shouldn't have taken that much effort to get to that point. The Contigo person I corresponded with was very courteous and responsive to my issue, making the email exchanges we had easy.