This mug is perfect for my use. It is good. Perfectly airtight and insulated very, almost too, I happened to burn my lips one hour after filling. It keeps warm very long, my tea is still hot 3 or even 4 hours after filling. I can take it anywhere, nothing is reversed and it perfectly fits the cup holder of my car. So I am delighted and I recommend this product, also I bought one for my daughter.
