I'm single and love Costco. I get my prescriptions there, I get oils there, I'll always get the organic chicken broth in cartons, sometimes I buy some of their ramen offers, I get the ground beef, organic spinach, potatoes, and carrots, and frozen vegetables for my dog's food.
I buy the three packs of organic chicken parts. I buy the three packs of organic ground beef, I usually give one to my sister's household. I'll also buy three pack of ribeye freeze two and cook one. And sometimes up by the boneless short ribs and makeup bunch of Italian stew.
Once in a while I'll treat myself to some of the expensive seafood.
Oh and other me or my sister will buy the big packs of paper towels and toilet paper and then I'll take some and they'll keep most.
I'll walk around and check out the store and sometimes they have other stuff that works for me. Oh the lox. Sometimes they have this good brand of guacamole that comes in three tubs and you can freeze them. So I eat one and freeze two.
In the winter I'll buy their refrigerated soups, couple of them are good, like the clam chowder. Here and there I'll buy the rotisserie chicken. Half for me, half for the dog.
There's a lot of good stuff there even if you don't have a big household