You can print multiple of these shelves to fit into your bucket at once.
Depending on your contents you might want to drill/model holes into it to, for example, remove excess water.
Printing Info:
Print the shelf on its bottom
Use regular supports to support the handle
Use random seems to improve the strength but it might leave a rougher surface
Since a bucket is usualy dirty I would suggest using PETG to withstand abuse from dirt, water, …
Erratum (12/12/25): Improvement of the fusion360 file
The author marked this model as their own original creation.