I actually received a much more expensive similar product for my birthday 2 years ago and needed another for the office.  I saw this product and the price and decided to give it a try.  What a great decision.  I can now walk around the office and even teach class while enjoying a Hot beverage.  When I take a break, just just put the lid on and set it on the coaster then go back to my Hot drink.  All I need now is to await you to offer a travel mug just as wonderful as this product.  Thank you!!