Review on Sigg Pollutant Free Insulated Guaranteed Leakproof by Michael Ward

So far I like this little thermos. Fits comfortably in the hand thanks to its low weight and compact shape. In addition, opening and closing for drinking is simple but convenient. This saves me from unscrewing or opening the lid. I only need one to sip which is great for travel. I have a problem with the cup. My drinks only stay hot for about 2-3 hours, not 6-8 like other stainless steel bottles I have. Otherwise it would be perfect. I'm taking off a star because the insulation could have been better, but overall it's a great purchase. EDIT: After using this mug for a while, I found that the spout isn't very convenient. Liquid spills out too quickly when swallowing, so pouring hot tea or coffee in it stings my lips. This prevents Fortis from enjoying drinks, so I'm deducting another star.