Hello everyone! Who makes homemade mashed potatoes? How long can they …

Hello everyone! Who makes homemade mashed potatoes? How long can they be stored, in what container? I used to eat them from cans, but now we're making our own, wow, turns out it's so convenient and very economical ? I just made a whole pot, but that's apparently 5-6 jars, I don't know how long it will last now.