Thinking Too Highly Of Those Eye Drops

I am a cashier at a large chain pharmacy. A customer comes up to my register with a bag of chips, a Mountain Dew, and a box of eye drops, specifically eye-whitening eye drops. He is very clearly stoned.

Me: “Did you find everything okay?”

Customer: “Yeeaaaahhhh…”

I finish the transaction and then turn to a coworker.

Me: “I don’t know who he thinks he’s fooling, buying those eye drops.”

Coworker: “Yeah, his eyes aren’t the only giveaway!”