Desk Cup Holder

I made this part because the cup holder from “sgenos” fit my mug very well, but it was too large for a beer glass. I made this insert to ensure the beer glass stands securely. It can be inserted and removed at any time, as desired. However, it is advisable to rub the upper 20 mm of the cup holder with a suitable candle (e.g., colorless/white), then the insert will slide onto the holder more easily.