Prefer the 25 pd cubes tbh, they stack and store better than the bags do, space at a premium it is a concern.
Cooking oil is also a really good thing to store.
My only real exception to the must stack rule is Toilet Paper bought at paper supply warehouses, 300 rolls for 40 bucks..hard to beat that price.
Where exactly do I find that deal?
There's one item I will never skimp on. It's my Charmin Ultra. On sale or not, if it's time to restock the cabinet, there's no room on my shelves for turnpike toilet paper.