Skip: Flour, baking powder, and dried yeast
Ingredients used in flour for baking, baking powder, and dried yeast can only stay on the shelf for short periods of time, so it is best not to purchase these in bulk. It is better advised to buy smaller amounts at the rate you may actually need them.
Buy: Kirkland organic coconut water
If you are all about the coconut eater health craze, get yourself over to Costco and buy the 12-pack Kirkland organic coconut water. Not only is it fairly priced, but the online reviews speak highly of it. It also does not go off quickly, so a bulk purchase is good.