I found a bunch of card holders, but all took ages to print and were overly complex and tough.
This was inspired by Playing Card Holder by crazycollie, which on my printer with my profile took 10 hours and 70 grams of filament to print. I descided to use vase mode and decreased the print time to 3 and a half hours, and the material to just 19gram.
Print settings are important! Don't just print with your usual settings. Please see print settings below.
cardholder_vase_curved.stl | 2.2MB |