Newegg offers the Arctic NFC/Bluetooth Stereo Speaker in Lime (pictured), Orange, Pink, or White, model no. S113BT, for $39.99. Coupon code "EMCPCHA233" cuts it to $19.99. With free shipping, that's the lowest total price we could find in any color by $29. It features a rubberized case, built-in mic, and Bluetooth 4.0.