This is small eatery devoted to one sandwich and one sandwich only, the grilled cheese. Co. Cheese has developed several variations on a surprisingly versatile sandwich, adding ingredients like Hunan pork and chili peppers or roast duck, brie, and onion jam. There are some people who rate this as the best grilled-cheese, or even the best sandwich, in Shanghai. These people are correct. The place also serves homemade pickles, and there's a bar serving spirits and beer. Bar owner Greg Jurksztowicz is enthusiastic about dogs, and the staff has treats on-hand and bowls for water.