Ebay offers Scosche Magic Mount Cup Holder for $17.99 (reg. $29.99) with free shipping.

Product Description:
•VERSATILE AND SECURE: Safely and quickly secure a cell phone or mobile device with the mount’s adjustable base to almost any vehicles cup holder.​•ROTATING ADJUSTABLE BASE: Bottom portion of mount base rotates to reduce in size and top portion rotates to expand in size for a secure fit into any cup holder.​
•STRONG MAGNETS: Extra powerful Rare-Earth neodymium magnets provide a secure grip to your devices and are 100% mobile device safe.​
•OPTIMAL VIEWING ANGLE: 360-Degree, rotating adjustable head provides customizable viewing options for your mounted device.