Coke?

Luke is obsessed with "Coke" lately. It's mostly when Cory's parents are around because he knows the diet Coke is around when Cory's dad is around, but whenever we are with them he says he wants "Coke" to drink. We usually just get him Rootbeer and tell him it is Coke to make him happy and to stop whining for it. I'm afraid he'll be in nursery or something and the leaders will ask the class to tell what they like to drink and Luke will yell out "Coke!" and the teachers will wonder what kind of parents he has! Hah!