This episode reveals how to save hundreds of pounds on pizza with one simple switch and the unbelievable things that could affect your car insurance premium. The programme exposes the online stores charging over the odds for products they don't even stock and reveals how you can find them much cheaper yourself. Plus: the truth about the latest crazes in bottled water and pricey toothbrushes - do you really need Bluetooth to clean your teeth properly? And we investigate gift cards. How can your money disappear if you haven't used the card?