I received the Mophie Power Reserve as a door gift at the official launch of Mophie in Singapore. It is retailing for S$69 in Singapore and you can get it from the Apple Online Store (Singapore). Last I heard, this product is going to be discontinued, so get it while you can.
Mophie Power Reserve is a 1,350mAh power bank that weighs 55g and measures 72 x 38 x 14 (L x W x H) (mm). It comes in four colors: black, white, gold and red.