I had previously given this product a high review, but after using the mug for a few months it fell apart. The 3 screws holding the liner in place rusted and because of that the bottom fell off. I tried to do some repair which helped for a while, but then the whole thing just came apart as I was washing it. I used it 5 days a week and therefore washed it 5 days a week. I guess if you never wash it you might be alright. Also, there is no insulation to keep your drink warm or cold.I did have this style mug before and the same thing happened to that one.Not any chance I would buy this again, which is a shame because it is a perfect size for me.