A variable "contains" only its (current) value. That's the only use of "contains" that makes sense to me.

You can "get" the address of a variable (or more generally, of any l-value) with the & operator. That operator is nothing else but an "escape" character that says "Dear C, I don't want you to load the current value of that variable. Give me just the address where it lives so I can load it later".

(Same applies to storing instead of loading)