GRRR!! Canned tuna irks me. Most brands are now 5 ounces or even 4.5 ounces. It only makes two really skimpy sandwiches. Or a skimpy casserole. And 2 cans is often too much for my needs. Costco sells 8-packs of 7 ounce tuna. But that's one of the few things I've found of value at Costco Jim
I buy 12 oz cans of tuna at Target. They are their Market Pantry private label brand. I buy the solid white tuna in water, but there are other types as well. I don't remember the exact cost, but I know it is less than using 2 or 3 of the (much) smaller cans. I see them in the grocery store and just wonder who is buying that small an amount? One of these cans makes several good sized sandwiches or fills up a casserole/pasta salad--enough for my family of 5 with leftovers.
(For Spinach Madeline that's important; if the cheese content is out of proportion it ruins the bechamel base.)