We buy almost all of the articles on the list except diapers (no babies at home), chewing gum (everyone likes a different flavor) and health and beauty products. I can usually get health and beauty products pretty cheap using a coupon at Walmart. I wish that Costco had been around when my kids were in diapers I would have saved a great deal of money.
I buy meat in bulk and repackage into smaller packages, this saves me a lot of money just by not shopping as often (what you don't see you can't buy). I do buy drinks in bulk because both my husband and son pack their lunches for work and this is cheaper than the vending machines. I buy beans in bulk cause we eat a lot of beans. I buy TP, paper towels, spices like garlic powder, black pepper, chili powder, onion powder, baking supplies, cheese, granola bars,and laundry supplies in bulk. We also buy dog food in bulk cause we have 3 small dogs and this saves me a lot of money. Buying in bulk saves me time, money and my sanity cause I don't like fighting the crowds at the grocery store or at Walmart.