They will also keep for up to a week in the fridge in air airtight container. (hiddenponies.com)
I know spinach doesn't keep for long once it is dressed, but I was thinking I could keep the dressing separate until ready to serve for lunch. (cookincanuck.com)
They will keep for years in the freezer with no noticeable loss of flavor or smoke. (fieryfoodscentral.com)