I purchased (with a discount) a new Contigo 24 oz. West Loop Stainless Travel Mug to use primarily at work.  It was still expensive, but my plan is twofold.  One – save money by drinking hot tea at work since the hot water is free and tea bags from the store are not too costly.  Two – drink less sugary drinks from the vending machines or the coffee shop.  This Mug worked like a charm today.  I filled it with hot water and a green tea bag just in time for a 2:00 pm meeting, thinking it might last me through the meeting at least.  Not only that, but the tea was still toasty warm and delicious at 5:30 pm when I decided to stop being a workaholic. I was impressed with my first go, and saved about $2.00 by using my own tea and not purchasing an afternoon drink.  The Mug will be paid for in no time.  Plus, the English dude from Lincolnshire in the UK, who sits nearby, highly recommends this contraption for the perfect tea time!  What could go wrong?