Not content with using a self-heating bra to save the planet, those utter mentalists at Triumph have devised another 'sexy' solution to climate change: a solar powered 'eco bra' that stores up energy during the day.

Unveiled this week in Japan, the bra works like any other solar device and when fully charged will contain enough juice to power everyday appliances such as toasters or kettles. Of course, to collect up all that energy the wearer cannot be shy about flaunting their underwear in public, so once again I can't help detecting an ulterior motive in Triumph's strategy...