While I still use several Nalgenes often I prefer to use 'disposable' ones. For example I get 25oz bottles of drinking water ($0.29 at Trader Joes), and refill them a number of times before tossing. The push/pull top is much easier to use single-handed when driving and even when hiking. They are also more flexible than bike water bottles, and hence easier to drink from. Also this size fits in cup holders in the car.
For spares when camping I take a number of 50oz bottles. It is easier to pack those than 3 gallon jugs.
Someone on this forum also turned me on to rectangular half gallon juice bottles. I freeze several and use them in the cooler, where they pack efficiently. When they thaw I have a bunch more bottles to use around camp (or toss if I have too many).
I still have an old poly Nalgene bottle, but that is reserved for answering the call of nature. The unique cap means I'm not likely to mistake it for other uses.