Toadstools? Snape grinned to himself as he observed that, and the other amusing implications of Al's careful classification system. Though aloud he only grumbled, mildly for him, "If any of the books get peckish, and you get back only threads or the odd button, don't come whinging to me."
"Still," he added, the smirk lingering, "I have to admit that the idea of using books to keep your clothes ironed is impressive."