El looks down into it beside him, eyes going big. She's read plenty about pirate treasure, or what people think is pirate treasure. She reaches out to touch the mug, but stops herself and looks at Hopper warily.

"I don't know," she admits. She looks into it again, then grabs one of the lid shards to see if there's any writing on the inside. If it belongs to someone, they shouldn't steal it, right?