The previous comments and the offer made by Amazon (flash offers) decided to throw myself in the acquisition of this object. And I do not regret the expense.
In fact, the taste is not altered. The object is simple in itself, metallic gray mat. The Thermos is well insulated, the walls are cold when you take it in hand. The cap can be used as glass in case of forgetting of the cup. In the tests I've done so far is fairly hot coffee after 10am (although somewhat weaker than at the beginning, but less and containing several openings). The opening is very simple and convenient, a simple push on the button "OPEN". In addition there with 1L of what to drink several glasses or share with colleagues.
In summary a very satisfactory product!
