Long Term Emergency Food Storage

[Skvez]

I doubt the milk container is any better for storing rice than the plastic bag that bulk rice tends to come in. Why bother transferring it?
The only reason to transfer it is if you want to transfer it to an oxygen-deprived environment to lengthen its survival (by asphyxiating any creatures that may be hiding in the rice). Opened milk bottles aren't air tight so they can't do this for you.

Leave it in the bag it came in, if you've not used it with a month or two of the use by date you can donate it to a homeless shelter and buy fresh. No-one will want your 'rice in a bilk bottle' donation.