Product Design

I'm looking for a final concept design to the sample image provided.
The item I'm looking for a design is a basket.
This basket must be able to hold the equivalent of a heavy shopping bag.
The hooks would need to be replaced with a adjustable clamp for varying diameter bars and a non slip function. I think also having the clamps in the middle rather than the end
The basket should also be designed with a integrated pocket to allow the basket to roll up for storage in situ to prevent this being removed.

So in turn
1. overall design and how it looks, how the clamp works, how it folds, and how it rolls into the pocket.
2. Produce a detailed 3d model detailing a layout and schedule
3. recommended materials and moving parts, The product is to remain as cost efficient to produce as possible

I'm Looking for a fixed price to Carry this project out