At this year’s International CES, Supertooth is following up its win for Car Accessory of the Year in our 2012 iPhone + iPod Buyers’ Guide with the introduction of two new products. The first is Disco2, which will be available at the end of the first quarter of this year for $99. A nicely designed Bluetooth speaker, Disco2 is portable and rechargeable, and can be used alone or in a pair for a stereo setup. Next up is Crystal, a car speakerphone.…