This is a weird one but diffrent drink sizes are obvious to me but aren’t obvious to the people I talk to. When I mention 20oz bottles of soda they seem confused about what I am talking about. Yet I know what sizes various flavors of Coke and Pepsi come in and what sizes they don’t come in.

an example is Tab and caffeine free flavors of coke and Pepsi (not caffeine free Diet Coke) only come in 12 pack cans.