Ok, So it's 2 chests. One is the "base chest" you have back at home. The other is a "Wormhole Backpack" you carry around with you, and is "keyed" like a teleporter is, to that base chest. When you want to get the items in the base chest, you simply set down your Wormhole backpack like a normal chest, and access the inventory that is at home. When you're done, you smash the chest (nothing falls out because it's technically sitting in the base chest) and continue on your way.
The recipe for the base chest would be something like Personal Safe + Advanced Circuit + (Advanced Machine or a Teleporter),
the wormhole backpack would be Personal Safe + Advanced Circuit + FreqTrans or something.
