I love my Nalgene; it's survived countless blckpacking trips and accepts a variety of water filtration systems.

But it sucks day-to-day in a domestic situation. The screw cap is inconvenient, there's literally zero insulation, and I've knocked it over in the middle of the night while reaching ior a drink of water mutiple times, dumping a liter of water oveg my nightstand, books, and carpet.

So at home I'm using a Coleman with a self-sealing top. Insulation isn't spectacular, but I can take a quick sip of water fron any position and just drop it whereveg with no concern for spillage. I wouln't take it backpacking, though.

The right tool for the job.