Costco is known for its large variety of items.

Okay, and its food court.

But mostly its large variety of items.

A bowl of flour on a wooden table

They have a ton ofweird, random items, and they have an excellentreturn policy.

Among the more random items is flour.

What’s astounding is the size of Costco’s flour bags.

Bags of flour stacked onto each other

Otherwise, it can go rancid or taste stale even before going rancid, per this Reddit commenter.