I loved the bottle for the 2 months that I could use it, but the bottle started leaking badly out of the bottom. There is no visible damage or issue with the seal either. I'm no longer able to use it since the leak is so bad. I may have just gotten unlucky and gotten a defective bottle, but in general there is a risk to leaking since the bottom does screw on and off. It is a cool bottle, but just be aware that some might leak.