Ok, but if I buy one from china it costs less than a Nalgene plastic one, even the fakes are pushing a tenner. If I buy a metal named brand from the states, they start at twenty before postage.
And if a filter fits you would think the other mods would too.
I think that other mods would fit, mainly because the Nalgene bottles shape and size have become the generic type.
I bought several Lifeventure 1litre 'wide mouth' bottles and Nalgene splash guards (from different companies) in the absolute certainty that they would fit perfectly, which they did.
The success of the Nalgene bottle inspired other companies to offer their own versions, and making the capacity and specific dimensions match those of the Nalgene broadened the appeal to buyers that did not want to spend so much money for the Nalgene, as they knew that accessories such as splash guards, carriers, sleeves etc would fit.
The price I got my Lifeventure 1litre bottles was too good to decline, and to be honest, I can't see the logic in paying double for the Nalgene.
I'm looking forward to seeing the Snow Peak titanium single and double wall bottles which will be out this year!