Not Kal-El Approved

At our bicycle shop, we sell many bike locks, with one of the brands being “Kryptonite.” A customer is looking at the locks with a confused expression. Then, she looks at me genuinely and asks:

Customer: “Are these locks made out of kryptonite?

Me: “…No, ma’am.”

Customer: “Hmm… Are you sure? Why would they call it that if it wasn’t made out of kryptonite?”

Me: “That’s the name of the brand, ma’am, not what it is made of.”

Customer: “Seems like false advertising to me. Are you suuuuuure it’s not made of kryptonite?”

Me: “Ma’am, if it was real kryptonite, it would be glowing green.”

Customer: “Yes, I suppose you’re right. It’s still false advertising, though!”

Me: “We’ll let corporate know, in case we get any Kryptonian shoppers.”

Customer: “You do that!”