This user would like to be more independent and be able to cook and use the kitchen by herself. She would need a tray to transport a cup and plate from one place to another in the kitchen. She uses her walker other places then just at home so the tray would need to be detachable.

Your task is to design a tray system for a posterior walker which can easily and independently be taken off or re-installed. It must be very stable and prevent anything from tipping. It must be easy to clean and maintain. It should ideally be adaptable to other types or sizes of walkers.

The user has this walker (large size): https://www.inspiredbydrive.com/product/nimbo/