My first from-scratch model. Designed to overcome common problems with similar products:

• Lid is firmly clipped on, so that it doesn't fall off on a dog walk.
• Includes a lead-in angle for the bag slot, so that it's easier to load new poo bag rolls.
• Side openings, to see how many bags remain and to allow the roll to be rotated to wind bags back in.
• Tighter grip on the lead rope, so the holder doesn't slide down to the bottom.

Fits bag rolls 30mm diameter and 60mm long. FreeCad model is parametric, so the roll diameter and length can be adjusted if required.