Willow Design has introduced an iBook slipcase for students. Users have easy access to the iBook while the slipcase is in the backpack.

The company has chosen to call the new slipcase the "Whumph". Nigel Peck, president of Willow, said: "The name, of course, sprang from the sound of safely jamming the slipcase into your pack with only millimetres to spare."

The case contains half an inch of foam and plastic to protect the iBook. It has a detachable handle and shoulder strap. The bags are available from the US, but the company will fulfil international orders, though such orders may be liable to import tax. The bag costs $60.