Specific fic where Tony is temporarily miniaturized

[mathiea]

I'm looking for a specific fic where Tony is somehow turned miniature. The Avengers quickly discover that with him now only inches tall, it's very easy to just put him in a box or a high shelf when he's annoying them. This leads to Tony having a panic attack when someone puts him in a box because it reminds him of being in a cave.

Does anyone know what fic this is? I'd also love to know of any other fics that feature the shrinking/miniaturization trope with Tony, but I'm specifically looking for this one.

Thanks!