Skip: Flour, baking powder, and dried yeast
Do you bake a lot? If this is the case, you have probably been frustrated by the short shelf life of baking powder, flour, dried yeast, and more. As much as possible, avoid buying these things in bulk. You should instead buy them in smaller doses so that they are not going to be in danger of going bad.
Buy: Kirkland organic coconut water
Do you like coconut water? If you drink a lot of it, feel free to bring home a 12-pack of the Kirkland brand. The organic water has gotten a lot of rave reviews on the internet. It is reasonably priced as well. You can buy this in bulk since there is no risk of spoiling it whatsoever.