Coin/Card Holder For Car Cup Holder by LedHead775 on Thingiverse: https://www.thingiverse.com/thing:7318126

Summary:
I wanted something to organize my loose change I would often have in my car for ordering drinks in the drive-thru on my way home from work, so I designed this. Fits in many car cup holders to organize change and hold gift cards. Designed to fit USD currency (pennies, nickels, dimes, quarters) . Part is 2.5 inches in diameter, but coins stick out a bit from the side, so minimum diameter for cup holder should be 2.75 inches. Can accommodate up to 5 cards, whether it be credit cards or gift cards. Part is 3 inches tall, and with cards inside is 3.625 inches.  