Induction cooktops are energyefficient, safe and easy to clean. The only problem is that, as they harness the power of magnetism, they only work with magnetic cookware. Normally, that rules out materials like aluminium, copper and glass – but now, thanks to this ingenious stainless steel disc, you can use all of your existing pots and pans. Dishwasher safe and 23.5 cm in diameter, it could save you a fortune! Props not included.