Exceptionally large holdalls manufactured by Head were briefly fashionable in the late 1980s and early 1990s. From their "classic" look - a base blue colour with red lettering - the bags became so popular that they started making pink ones for girls and fluorescent ones for wankers.

The inside of a Head bag was so vast that nobody could hope to fill it with legitimate school supplies, but was the perfect size for us to incarcerate any first year pupil who happened to own one of the bags. A twist of a paperclip would lock the zip, and a good kicking would be applied for luck. After lunch it was common to see at least one squirming mound of lurid PVC in the middle of the playground.

I have to admit to getting one of these about two weeks after they went out of style. What's worse, my mom bought it for me. And she deliberately chose one sporting the school colours.