Lurico via Amazon offers its Lurico All-in-One 2.4-Amp Travel Adapter for $20.99. Coupon code "ELJ2YDRV" cuts that to $12.99. Plus, Prime members bag free shipping. That's $17 off and the best price we could find. It covers over 150 countries with US / EU / AU / UK plugs, features a USB port, and built-in safety shutter.