Review on 🍵 Tervis Clear & Colorful Mug Insulated Tumbler: 16 oz, Tritan, Clear with Black Lid by Dante Black

I bought two mugs based on my previous experience with Tervis products, but I use these mugs almost exclusively for coffee and add cream to my coffee. There was a stain on both cups. I'll admit I don't wash them after every use, but I do rinse them. The stain turns the transparent cup opaque and a light brown color. I've tried repeatedly to use the Tervis recommended procedure for cleaning and it hasn't worked. I contacted the seller and he said if I want to return them at my own expense they will determine if they are covered by the replacement warranty. I paid $11 for each of them, and it would cost me at least $8-$10 just to see if they would be good replacements. I'm tired of using them for anything as they just look awful. I DO NOT RECOMMEND IT FOR COFFEE.