Summary

Simple cup/phone holder that latches onto the side rail of your DPS tray. Unfortunately only works for the flat side rail and not the curved ones on the older model trays but you can still latch it onto the front black panel. Use 2 small zip ties to loop around the Body and Arm pieces and cut off excess. Cup is designed to hold regular sized water bottles or small insulated bottles. Will fit most sized soft drink cups. I recommend printing in PETG so it won't deform under hot summers.

Settings:
Material : PETG
Layer : 0.28
Infill: 10%

no supports should be needed.