This is a keychain with holes for a USB type A and a USB type C port. It's useful for transporting small cables (I use it with a 30cm cable) to charge your phone with a powerbank on the go.
The holes have a tight fit, so the cable will not fall.

To print it I used support only on the part on top, and removed the supports under the holes from Cura.

Print instructions

Category: Mobile Phone Print Settings

Printer Brand: Creality

Printer: Ender 3

Rafts: No

Supports: Yes

Resolution: 0.15

Infill: 10

Notes:

Remove the supports in the holes from the slicer you use. It is only a waste of material.