Quantum Toast Storage

So your quantum toast storage device (QTSD) comes in four parts: the quantum toast transmitter device (QTTD), quantum toast receiver device (QTRD), quantum toast computer device (QTCD), and quantum toast qubit device (QTQD).

You simply insert your freshly-toasted toast into the QTTD, then you press the button. The QTTD seals itself perfectly, leaving the toast completely isolated from its surroundings.

The QTTD then uses a miniature particle accelerator to create a tiny black hole, then runs this black hole through your toast. This black hole of toast is then measured in every way possible, and the results are sent to the QTCD. Since the black hole has been measured in every way, it no longer exists, and the QTTD can be opened safely.

The QTCD performs lots of calculations, then simply holds the qubits in the QTQD. Then, an hour or two later, you press the button on the QTRD, and the qubits from the QTQD will be fed into another black hole.

The QTCD will have munged these qubits in such a way that when they're injected into the black hole, the Hawking radiation from the black hole assembles itself into toast. The QTRD will perform some final manipulations, producing fresh qubits which can be sent back to the QTQD.

Finally, you open the QTRD, only to find that due to errors in the computations, the toast has turned into assorted illegal drugs and counterfeit cash, and called the police. That's what happens when the inside of the QTQD gets scratched.