How long will RO water keep in 5l water bottles?

[Benfleet Brewery]

I’ve drawn off 20l RO water in prep for brew day tomorrow calculating for a pale ale profile using 50% RO, 50% tap water plus additions. However, it has only just occurred to me that I'm adjusting this water to a sulphate/chloride profile not too dissimilar to my tap water so I may as well just use that with extra lactic. Question is, will the RO be ok in the ashbeck bottles until next week?

 

[MZonard]

This is for kit brews? Just fill the Ashbeck bottles with RO to the brim and screw the caps on tight. I've left them for 2 weeks before use. I can't see how it would deteriorate. I also 50/50 with the local (very hard) spring water (so no chlorine). I'm concerned not to poison folk so I pasteurise the spring water in a Burco boiler (70*C) the day before 'brewing'. If you're AG brewing that boils out any bugs anyhow.