I recommend to print the tray in PLA or better in PETG (so it wont deform if it gets washed under hot water) with an infill of at least 15% and a layer height of 0.2mm.
Update:
Thanks for your feedback and sharing your makes! :)
I made a new version (V2) with better fitting and also a version with slightly rounded bottom corners to make it a bit easier to wipe out the tray.
The author marked this model as their own original creation.