The backstory: We were eating supper at a friend's house on Saturday evening. JT and the other boys each had a plastic cup to drink from and at one point I was seeking a sip of water, so I called upstairs to ask JT what color cup he'd been using. He told me and I helped myself. Later that night, as I was tucking him into bed, he returned to that conversation.
JT: When you asked me what color cup I used, I was confused.
Mama: Oh yeah?
JT: Yeah, I thought of the other kind of cup (the one I wear when I play baseball) and so I was going to tell you "The color doesn't matter, Mama, just get the right size."
Mama: Oh my.
In the future, a more descriptive word choice is in order.