On Monday, July 25, 2016 at 3:58:58 PM UTC-5, axlq wrote:
>
> a nearly-full Costco-sized open box
> of Cheerios was hidden under something else. Thinking it had been
> consumed, we opened a SECOND huge box. Then we discovered the
> already-open box.
>
> Both are fresh, but there's no way we'd consume all of those Cheerios
> before they go stale.
>
>
Just put them in a large Ziploc bag, try to squeeze as much air
out as possible and close.