You couldn’t tell what it was made of, and that meant expensive. Something dark gray, like the lead in a pencil, thin as the shell of one of those eggs, but you could probably drive a truck over it. Like her bike. She’d figured out how you opened it the night before; finger here, thumb there, it opened. No catch or anything, no spring. No trademark, either; no patent numbers. Inside was like black suede, but it gave like foam under your finger.