It's like translating grandma's units of measurements from her old recipes.
"A smidge of this, three sprinkles of that, and a can full of something that does not come in a can" (The can was her 'measuring can' that was some kind of weird size that doesn't exist anymore)
Edit: After she passed, we threw the can away because we didn't realize it was the can and load-bearing to most of her recipes. After some best guesses + trial and error, we concluded the can was approximately 7 ounces / just under a cup.