The holder is at a 20-degree angle, and for attachment in the trunk, adhesive hook and loop fasteners are required. Part of the fasteners will adhere to the bottom of the holder, and part to the side, where a flat surface is prepared for them. No supports are needed. Due to the temperatures that can occur in the car during summer, I would recommend TPU. However, since I didn't have it, I used PLA. If there is an issue, I will reprint the holder.
The inner diameter is 83.5mm and the height of the tube is 140mm.
The author marked this model as their own original creation.