That takes the biscuit

Life is full of intractable problems, such as how to get to Mars, or how to hold a hot drink and a biscuit in one hand while doing something useful with the other. Dominic Skinner of Surrey reckons he can solve the latter (GB 2364889). His patented biscuit mug is a double-decker, with a conventional drinks container on top and a shelf below. The shelf is tall enough to take a stack of up to three biscuits—any more would be greedy, after all. The mug has to come in left and right-handed versions, because the closed wall of the shelf…