I know these were designed in 1999 and not exactly the most recent but the Poaa Dumbbells by Philippe Starck is almost like a sculpture. The gold ones are (each) 2kg dumbbells and the gun silver ones are 3kg each. It was designed for London's Sanderson Hotel, and part of a project led by Starck for the hotelier Ian Schrager, from Studio 54 fame. After toning your arms, you can leave it on the table as a paper weight or even on display in a shelf. It definitely looks better than the usual plastic dumbbells which should be kept hidden from view when not in use.