Stackable Puzzle Sorting Trays Jigsaw Puzzle Sorters with Lid Puzzle Accessory for Puzzles Up to 1500 Pieces, 6 Trays in Yellow

This finally arrived on 6-1-20. I ordered in on April 8, 2020. I don’t know about sturdiness. Also I have not used them yet.these are small but they will work. 6-29-21 these are small but sturdy.

It is very nice but a lot smaller then u think

given as a gift for a puzzle lover and she told me she uses this everyday!