This is my second purchase of the same water bottle, because, the first one I got I loved so much and get so many compliments on, that I bought a backup :) It's totally spill-proof. Has the CUTEST design. The flip-top is super duper handy. The carry strap is a nice addition but makes it kind of cumbersome the way I use it. I will be travelling soon and I imagine it will be handy then.