Butter, eggs, milk, some yogurt and cottage cheese, parmesan/romano cheese, and some meats and very few other things as I get them. It's a very small countertop fridge that runs on 120 with the freezer the size of a shoebox.
The bread baker always has yeast, sesame seeds and unsalted butter in stock in the fridge. There's never a guarantee that everything else will always be there, but I buy those three in bulk. More often than not, there's usually something dead in the lunch meat drawer. We never seem to eat that stuff often enough before it goes bad.