Wondering if anyone has heard/seen/had any such thing.

We have a 22' sailboat we would like to use it in brackisk/salt water as
well as fresh. Ability to carry it on hikes/camping would be great as well.
Large capacity is not critical (1-2 gal per day would be plenty).

There are plenty of purifiers on the market (Katadyn, First Need, MSR,
etc.), but none can desalinate.

Any leads would be appreciated.

Thanks,
Don