Hello. I can't quite follow why the underlined words could be a joke in this context below.
Please help! Thank you.
: These sentences are from a children's novel. (It is a magical fantasy for children like Harry Potter.)
In the story those special phials are used for containing creatures popping from some special magic books.
Archie accidentally made a knight(Sir Bodwin) pop out from a book the other day.
Old Zeb handed the glass phial to Archie. "Put it with the one from the other day,"
he said. "It's not much of a phialling system," he added, with a grin, "but it'll have to do!"
Archie smiled at his joke and placed the phial with the mammoth on the shelf next to the one containing Sir Bodwin.
"phialling system" / "filing system". It's a pun.