The model in OnShape: https://cad.onshape.com/documents/45db93f8d721b93b723f6a56/w/6ee936a37368398090f76c5c/e/56d9e45944efb1f14c582f25

Original product (link valid at a time of upload, the picture is in the gallery): https://www.kocarky.cz/dooky-drzak-napoju-universal-cup-holder

One of the strap “eylets” needs to be fdesigned as splitted as the strap is sewn.

I broke the original broken part to get the brass insert. Unfortunately it was too fragile and cracked while hot inserting. But the thread is still holding.

Final version printed from ASA with 5 perimeters. Longevity to be seen…