Had a beloved OGGI travel mug I used for a long time, but their latest models do not have the same features or durability anymore. This is a wonderful replacement! I wish it weren't so pricey, but it absolutely retains heat and cool temps throughout a full 8 hour work day at the very least. The closable carrying handle is convenient and the interchangeable lid/mouthpiece are easy to clean. Hopefully, as I am unfortunately pretty clumsy, this one will prove just as durable over time. It certainly feels sturdy so far.