Buy 50 pound bags of rice at Costco for $17.00
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.
Wow your Costco must be cheaper than mine and have larger bags of rice. I paid $16.99 for a 25 lb. bag of rice.
Have bought several 50 pound bags of rice...and wheat...and oats...and even popcorn. Figured I should buy before the prices get too high. I even have bought a lot of cases of TP...just in case :)