High-tech cards that store all your credit, gift and loyalty card info haven't exactly made it big yet, but the competition's already heating up. The newest entry in the race is called Swyp: a metallic device with a screen that transforms into the card you want to use when you need it, so long as you choose the appropriate one using its scroll buttons. In order to upload info, you'll need to scan credit cards and loyalty cards with magnetic strips (support for scannable barcodes will come later) using a reader that plugs into a phone's headphone jack. Each card's details are then stored in the accompanying app, which you can also use to snap pictures of paper receipts. The device itself can store up to 25 cards' info, more than what its rivals can handle: Coin, its oldest competition, can store up to 8 cards, while Plastc can keep up to 20.