But it's dual use so you can subtract the weight of your normal bottle.
Yes, I think I get that. The maths and the logistics are getting me a bit flummoxed though.
If I take the smart water bottle as my 'normal bottle', I would need to supplement it with yet another bottle to achieve my target water carrying capacity. Let me explain:
As I see it, I need to be equipped to carry a maximum of 3 litres at any one time (if exceptionally I need more than that I'll make different arrangements).
Plus a Sawyer Mini, plus a means of backflushing it.
Currently I carry the filter, the syringe (32g), a 2L Platypus bottle (36g) and a 1L Sawyer 'dirty' pouch (26g). Whilst 'on the go' I can directly from a clean source (using mug), or from filtered water in the Platypus, or from the dirty water bottle via the filter. Ecxluding the weight of the filter (which is a 'constant'), this comes to 94g.
If I go the Smartwater route, I'll carry the Smartwater bottle (40g) the Sawyer pouch (26g) and another container (Evernew's 12.5L @ 36g?) making a total of 90g, which ain't much difference.
Or am I justing getting overly hung up on what amounts to the weight of a single swig of water?