Could a customer be anymore stupid?

What I would like to tell

some of our customers.

Customer: "Um yes, we just bought bottles from your company and we need the dimensions of the bottles for a project we're working on."

Me: (as acting receptionist since MR left us high and dry up Sh!t Creek) "Okay, what's the company name, please?"

Customer: "Um, it's just..." (this is where he proceeds to tell me the company name of who I work for.)

Me: "No, I'm sorry - not my company name, but your company name."

I now have a red mark on my forehead from where I banged it on my desk a few times.