Last year I realized that I was spending over 500 Euro buying coffee at work. This was definately an area that I could address in order to save money!! I purchased a Tassimo coffee maker (Espresso..Latte...Cappucinos...) in order to make some quality coffee at home. Now I needed to find a way to safely transport my lovely coffee to work. I read all of the reviews and watched customer videos that rated this Contigo West Loop Autoseal Mug and decided to splurge (you get what you pay for!). Well, it has been 5 months now since my purchase and I can honestly say that this travel mug is worth it's weight in gold! I warm up the mug with hot water and then fill as recommended to below the cap threads. I then throw the mug into my handbag. Never once has this mug dripped or leaked or spilled a single millilitre of liquid!!! The seal on the lid is amazing! When you depress the "serving button" you can hear the hiss as the heat and pressure is released. My coffee stays hot in the mug for 3 hours and there isn't any taste of plastic off of the cap. The mug itself is very stylish and has a great ergonimic design... feels great to hold! I absolutely love this travel mug and would DEFINATELY purchase another. I am saving a fortune by making my own specialty coffee and am confident that this mug will transport the contents safely. I cannot recommend this product enough. DO NOT HESTITATE.....BUY THIS ONE!!!