Leomund’s Secret Chest in GURPS Magic - how?

[mlangsdorf]

Hideaway (Magic p 61) lets you create a storage container that holds more volume than its physical size, and optional lets anything inside the Hideaway not count as encumbrance.

Hide Object (Magic p 86) lets you move a non-living subject into an extra-dimensional space, and only you can retrieve it.

In theory, for 200 energy per pound of storage, you could enchant a container with Hideaway and Hide Object and have a Bag of Holding that disappears and reappears on command.

Hideaway might be redundant with Hide Object, because it's not clear if an item under Hide Object counts as encumbrance. But it's also unclear if casting Hide Object on a bag full of stuff disappears the entire collection or just the bag - and I'd personally rule that it just disappears the bag and the stuff spills out. But casting Hide Object on a bag full of 0 encumbrance stuff due to Hideaway seems like should disappear the bag and the contents, whatever they are.