No joke ever since I got this water bottle, I've been drinking almost a gallon of water every day. I put ice in it at 10 am and it will still have ice at 2 pm. Even after a few refills. It's amazing. I actually forgot the bottle this morning(and was so depressed, that's how much I adore this thing), and the green tea inside was STILL cold when I got home 8 hours later. I haven't tried any hot liquids yet so I can't say for certain that it keeps drinks hot or not. I honestly expected this thing to be bigger since its 27 oz but its actually the perfect size. Not to bulky or heavy. Long story short I am so glad I decided to buy this! Not only has it increased my daily water intake, but its perfect for taking to the gym(I don't have to worry about refilling it a million times at the water fountain), and has a beautiful design. I got the army green color and I love the soft finish on the outside.