I've just discovered a new Milan-based design company called NotCom which has loads of ideas to make urbanites' lives easier.
They have a 2 dogs leash that comes with a nifty pocket to store plastic bags, keys and wallets, T-shirts for cyclists with patterns to indicate which way you're going to turn while zigzagging in the traffic and tees with special shoulder padding for those who wear shoulder bags.
Hope they'll translate their website into English...