Review (5/5): Had to buy another
I got mine for Christmas and I use it daily for work. I start with HOT tea(2 bags) and it is still HOT, not warm but HOT, 5 hours later. Then I empty my drink bottle of COLD water or what ever I'm drinking into my Gus tumbler and it stays COLD for hours! For a fraction of the cost? Win-win! Thank You Gus!