A thin (around 1 cm) but sturdy ID, credit card, and money holder (can hold several folded banknotes, designed so a 20€ note doesn't stick out) with keychain usability. Perfect for partying or going to the beach to bring only the most necessary things with you. Designed so the money and cards are easy to get out with your nail or finger, just lift the cards through the hole cut at the bottom.
If you want it customized, send me an email so we can figure things out. Photos of the thing in use is coming.