The cheapest copay

Last night we went to a "pizza party" which a drug rep put on for the residents to promote their line of insulin products. Families are welcome so we all go and are sitting eating pizza when the rep interrupts everyone and says he has to "pay the bill" and does a short bit about the insulin pens, importance of being informed, blah, blah, blah and how their company makes sure their insulin is available statewide, blah, blah and they also have the cheapest copays in the state. The rep then asks if anyone has any questions and my son raises his hand then leans into his dad and asks (like wow) "the cheapest copays?"