A memorable moment in Mr Bean came when he invited some friends for drinks and then realised to his horror that he had no snacks. So he leant out of the window, plucked a few twigs from the tree, dipped them in marmite and then put them in a bowl. The friends left shortly afterwards.
Twiglets are not in fact made from marmite. But they are designed for marmite addicts. And, if uneaten, they last for a very long time.