CPAP DISTILLED WATER for sale ?

well I finally found distilled water as recommended in Ixtapa
they also had injectable water at farmacia coyuca

all in 1 litre bottles

but if I do the math the cost is like 12 dollars per gallon

in the us its 1.50

may just run dry

thanx again

or make my own

soriana is only on line and they use for ironing clothes and that comes in at about 6 dollars a gallon and then probably delivery charge