It gives a completely new meaning to the phrase "rock 'n roll." For boffins have invented a cutting-edge gadget combining a portable music player and a toilet paper dispenser. The state-of-the-art device--called an iCarta--makes it easier for people to listen to beats while using the bathroom. The gadget <A HREF="http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=390737&in_page_id=1770">merges an iPod docking station with a loo roll dispenser.</A>