I'm really lazy, let's just get that across now, and this was made almost especially for creatures like me. Lazy creatures. I hate having to rip off the little connecting pieces to other water bottles just to refill them. This one is awesome because not only does it just un-clip by tugging it off the holding clip, you just slip the rubber lid off, fill it up and you're done. Not to mention the drinking spout has a spring loaded ball bearing in it rather than one that works solely based on the assumption that gravity will solve all your problems. The answer is no, gravity does not solve all your problems, but this spring will keep your bottle from leaking stupidly when gravity decides it's no longer going to return your phone calls.