After a long day out my drink still had ice in it when I got home. My soda didn't even lose its fizz. It's very easy to fill because the entire top screws on like a thermos. I can tip it over and not a drop leaks out, which is great. No more sticky cup holders from my leaky travel mugs. It is very easy to clean because I just throw it in the dishwasher. I would definitely recommend this to anyone who loves high quality products.