I've been using this bottle almost daily for a couple of months now. It is very sturdy and easy to clean. The insulation works well, too - if I fill it half-full with ice and the rest with water, then keep re-filling with water throughout the day at work, there will still be solid ice in the bottom by the time I get home, 10 hours later. I haven't tried it with hot beverages yet, as I have a travel mug that I use for that purpose.
Rating: [5 of 5 Stars!]